A Mars Orbiter Just Detected Something It’s Never Seen Before

water on mars

  • The atmosphere of Mars is thin and, compared to Earth, barely even there at all, but it can still teach us about the history of the planet and its present-day status.
  • The ExoMars Trace Gas Orbiter, which is a project from the European Space Agency and Russia’s Roscosmos, recently detected a gas that it never found before.
  • Hydrogen chloride, which requires specific conditions in which to form, has been detected in the atmosphere, raising many questions. 

The Mars we see today is mostly dry, dusty, and barren. Sure, there is some water locked away in ice near the poles, and possibly some melting that happens during the Martian year, but aside from that there’s very little that offers clues as to the planet’s potentially rich and life-giving history. Projects like the ExoMars Trace Gas Orbiter, sent to Mars by the European Space Agency and Russia’s Roscosmos space group, are helping to pull the curtain back and reveal some of the secrets the planet still holds.

Now, in a pair of new studies published in Science Advances, researchers using data from the Trace Gas Orbiter reveal that they’ve found a gas they’ve never seen before around Mars. The newfound gas, hydrogen chloride, which is the first halogen gas found in the Martian atmosphere, seems to be linked to seasonal changes, but the discovery ultimately raises more questions than it answers.

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A planet’s atmosphere might not seem like a super important thing to study, especially in the case of an atmosphere as thin as that of Mars. But while the atmosphere of Mars may not be enough to support life on its surface, it can still serve as an indicator of what processes are playing out on the surface of the planet. The exciting part about discovering hydrogen chloride in the Martian atmosphere is that it suggests that water was (or still is) a significant component of the planet’s climatology.

“You need water vapour to free chlorine and you need the by-products of water—hydrogen—to form hydrogen chloride. Water is critical in this chemistry,” Kevin Olsen, co-author of the research, said in a statement. “We also observe a correlation to dust: we see more hydrogen chloride when dust activity ramps up, a process linked to the seasonal heating of the southern hemisphere.”

But what exactly does this mean? It’s still hard to say. Whatever is generating the gas appears to be linked to summer in the planet’s southern hemisphere, but beyond that, it’s difficult to determine the chain of events that is leading to its generation.

In the second paper, researchers reveal that measurements of the ratio of deuterium to hydrogen in the planet’s atmosphere point to huge losses of water over the planet’s history. This supports the idea that Mars was once rich with water and potentially even supported massive lakes, rivers, and oceans on its surface.

Mike Wehner has reported on technology and video games for the past decade, covering breaking news and trends in VR, wearables, smartphones, and future tech. Most recently, Mike served as Tech Editor at The Daily Dot, and has been featured in USA Today, Time.com, and countless other web and print outlets. His love of reporting is second only to his gaming addiction.

Source: A Mars orbiter just detected something it’s never seen before – BGR

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The US space agency NASA has released the first audio from Mars, a faint crackling recording of wind captured by the Perseverance rover. A microphone did not work during the rover’s descent to the surface, but it was able to capture audio once it landed on Mars. The first-of-its-kind audio has been released along with extraordinary new video footage of the rover as it descended and landed last Thursday.
On the show we are joined by Dr Swati Mohan, the Indian American scientist who led the guidance and control operations of the Mars 2020 mission. She talks about the what the ‘Seven Minutes Terror’ was and about the tiny bindi she wore that has generated a huge buzz on social media. NDTV is one of the leaders in the production and broadcasting of un-biased and comprehensive news and entertainment programmes in India and abroad. NDTV delivers reliable information across all platforms: TV, Internet and Mobile. Subscribe for more videos: https://www.youtube.com/user/ndtv?sub… Like us on Facebook: https://www.facebook.com/ndtv Follow us on Twitter: https://twitter.com/ndtv Download the NDTV Apps: http://www.ndtv.com/page/apps Watch more videos: http://www.ndtv.com/video?yt​.
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NASA Chooses Three Landers to Return Americans to the Moon

It’s been nearly half a century since the U.S. had a spacecraft capable of landing human beings on the moon. As of today, it has not one, but three—if everything goes right.

NASA officials announced on April 30, in a teleconference with space-industry leaders, the three finalists it has chosen to build the 21st century version of the Apollo-era’s well loved lunar excursion module (LEM), the four-legged, gold-foil, so-ugly-it-was-beautiful machine that landed six crews on the surface of the moon from 1969 to 1972. Unlike the LEM, which was effectively designed by NASA and then built to order by the Grumman corporation, the new landers are being designed entirely by private companies, which will then compete to prove to NASA that theirs is the ship the agency should pick.

The company names were announced alphabetically at the teleconference, but the first one called out—Blue Origin, of Kent, Washington, founded and owned by Amazon boss Jeff Bezos—might be the best bet for success anyway. Blue Origin is working with three other companies (Northrop Grumman, Lockheed Martin and Draper) to design a two-stage lander similar to the LEM. The LEM landed on the moon in a single piece and the astronauts then blasted back off in just the vehicle’s upper portion, using the bottom half as a sort of launch platform.

The second company, Dynetics, of Huntsville, Alabama, is proposing to simplify things, building a one-stage vehicle that will land in a single piece and take back off that way. The third contender, SpaceX, headquartered in Hawthorne, California, submitted the most audacious proposal: its much-touted, 50-meter (160-foot) tall, 100-passenger Starship spacecraft, which it would launch atop its own 68-meter (223-foot) tall Falcon Super Heavy rocket. Once at the moon, the Starship would land and take off in a single piece using its own set of engines.

“We want to be a customer,” NASA Administrator Jim Bridenstine said on the teleconference, stressing that the responsibility for designing the hardware and delivering the goods lies with the finalists. “We want to drive down the costs and increase access to space. This little agency is moving forward.”

But the little agency needs a lot of money. For the Trump Administration to reach its target of having astronauts back on the moon by 2024, NASA will need a funding boost of $3 billion—to $25 billion total—in 2022, with additional bumps that bring it up to $26 billion and $27 billion in 2023 and 2024, respectively.

That’s a big ask given years of flat funding for the U.S. space program, but NASA is hoping to benefit from Congress opening its wallets to help keep the economy afloat during coronavirus pandemic. Without that money, NASA will be unable to fund the lunar lander, or the Orion crew vehicle and the Space Launch System—the modern-day version of the Apollo orbiter and the Saturn V rocket—that will also be necessary to bring humans to the moon.

What’s more, NASA may wind up needing money to pay for the services of more than one of the three contending lander groups. Over the course of the next 10 months, the teams will be refining their plans, and, in the process, pitching their wares, with an eye toward February of 2021, when NASA will choose a winner. But the ostensible losers may eventually fly anyway.

NASA is stressing both speed—getting to the moon by 2024—and sustainability, going there to stay, rather than making the brief Apollo-style visits that have since been disparagingly dubbed the “flags and footprints” model. In the same way NASA will be paying both SpaceX and Boeing to ferry crews to and from the International Space Station, so too it might pay for the services of a company that is not chosen to build the lunar lander, but goes on to develop its own moon capability anyway.

By Jeffrey Kluger April 30, 2020 6:09 PM EDT

Source: NASA Chooses Three Landers to Return Americans to the Moon

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Seeking ideas for landing systems to return humans to the Moon, showcasing our aeronautics research efforts, and the science connection to Apollo 11’s splashdown … a few of the stories to tell you about – This Week at NASA! This video is available for download from NASA’s Image and Video Library: https://images.nasa.gov/details-NHQ_2…

How Far Is It To The Edge Of The Universe?

Artist's logarithmic scale conception of the observable universe. Galaxies give way to large-scale... [+] structure and the hot, dense plasma of the Big Bang at the outskirts. This 'edge' is a boundary only in time.

If you were to go as far out into space as you can imagine, what would you encounter? Would there be a limit to how far you could go, or could you travel a limitless distance? Would you eventually return to your starting point, or would you continue to traverse space that you had never encountered before? In other words, does the Universe have an edge, and if so, where is it?

Believe it or not, there are actually three different ways to think about this question, and each one has a different answer. If you consider how far you could go if you:

    • left today in an arbitrarily powerful rocket,
    • considered everything that could ever contact us or be contacted by us from the start of the hot Big Bang,
    • or used your imagination alone to access the entire Universe, including beyond what will ever be observable,

You can figure out how far it is to the edge. In each case, the answer is fascinating.

We often visualize space as a 3D grid, even though this is a frame-dependent oversimplification when... [+] we consider the concept of spacetime. In reality, spacetime is curved by the presence of matter-and-energy, and distances are not fixed but rather can evolve as the Universe expands or contracts.

ReunMedia / Storyblocks

The key concept to keep in mind is that space isn’t how we normally conceive of it. Conventionally, we think about space as being like a coordinate system — a three-dimensional grid — where the shortest distance between two points is a straight line, and where distances don’t change over time.

But both of those assumptions, so thoroughly good in our everyday lives, fail spectacularly when we begin looking at the larger-scale Universe beyond our own planet. For starters, the idea that the shortest distance between two points is a straight line falls apart as soon as you start introducing masses and energetic quanta into your Universe. Because spacetime is subject to curvature, which the presence of matter and energy is the cause of, the shortest distance between two points is inherently dependent on the shape of the Universe between those points.

Instead of an empty, blank, three-dimensional grid, putting a mass down causes what would have been... [+] 'straight' lines to instead become curved by a specific amount. In General Relativity, we treat space and time as continuous, but all forms of energy, including but not limited to mass, contribute to spacetime curvature. If we were to replace Earth with a denser version, up to and including a singularity, the spacetime deformation shown here would be identical; only inside the Earth itself would a difference be notable.

Christopher Vitale of Networkologies and the Pratt Institute

In addition to that, the fabric of spacetime itself does not remain static over time. In a Universe filled with matter and energy, a static, unchanging Universe (where distances between points remain the same over time) is inherently unstable; the Universe must evolve by either expanding or contracting. If Einstein’s General theory of Relativity is correct, this is mandatory.

Observationally, the evidence that our Universe is expanding is overwhelming: a spectacular validation for Einstein’s predictions. But this carries with it a series of consequences for objects separated by cosmic distances, including that the distance between them expands over time. Today, the most distant objects we can see are more than 30 billion light-years away, despite the fact that only 13.8 billion years have passed since the Big Bang.

The farther a galaxy is, the faster it expands away from us and the more its light appears... [+] redshifted. A galaxy moving with the expanding Universe will be even a greater number of light years away, today, than the number of years (multiplied by the speed of light) that it took the light emitted from it to reach us. But we can only understand redshifts and blueshifts if we attribute them to a combination of motion (special relativistic) and the expanding fabric of space (general relativistic) contributions both.

Larry McNish of RASC Calgary Center

When we measure how distant a variety of objects are from their physical and luminous properties — along with the amount that their light has been shifted by the Universe’s expansion — we can come to understand what the Universe is made of. Our cosmic cocktail, at present, consists of:

  • 0.01% radiation in the form of photons,
  • 0.1% neutrinos, an elusive, low-mass particle almost as numerous as photons,
  • 4.9% normal matter, made mostly of the same stuff we are: protons, neutrons, and electrons,
  • 27% dark matter, an unknown substance that gravitates but neither emits nor absorbs light,
  • and 68% dark energy, which is the energy inherent to space that causes distant objects to accelerate in their recession from us.

When you combine these effects together, you get a unique and unambiguous prediction for how far it is, at all times past and present, to the edge of the observable Universe.

A graph of the size/scale of the observable Universe vs. the passage of cosmic time. This is... [+] displayed on a log-log scale, with a few major size/time milestones identified. Note the early radiation-dominated era, the recent matter-dominated era, and the current-and-future exponentially-expanding era.

E. Siegel

This is a big deal! Most people assume that if the Universe has been around for 13.8 billion years since the Big Bang, then the limit to how far we can see will be 13.8 billion light-years, but that’s not quite right.

Only if the Universe were static and not expanding would this be true, but the fact is this: the farther away we look, the faster distant objects appear to speed away from us. The rate of that expansion changes in a way that is predictable based on what’s in the Universe, and in turn, knowing what’s in the Universe and observing how fast objects expand tells us how far away they are. When we take all of the available data together, we arrive at a unique value for everything together, including the distance to the observable cosmic horizon: 46.1 billion light-years.

The observable Universe might be 46 billion light years in all directions from our point of view,... [+] but there's certainly more, unobservable Universe, perhaps even an infinite amount, just like ours beyond that. Over time, we'll be able to see more of it, eventually revealing approximately 2.3 times as many galaxies as we can presently view.

Frédéric MICHEL and Andrew Z. Colvin, annotated by E. Siegel

This boundary, however, is not an “edge” to the Universe in any conventional sense of the word. It is not a boundary in space at all; if we happened to be located at any other point in space, we would still be able to detect and observe everything around us within that 46.1 billion light-year sphere centered on us.

This is because that “edge” is a boundary in time, rather than in space. This edge represents the limit of what we can see because the speed of light — even in an expanding Universe governed by General Relativity — only allows signals to travel so far over the Universe’s 13.8 billion year history. This distance is farther than 13.8 billion light-years because of the Universe’s expansion, but it’s still finite. However, we cannot reach all of it.

The size of our visible Universe (yellow), along with the amount we can reach (magenta). If we... [+] accelerated at 9.8 m/s^2 for approximately 22.5 years and then turned around and decelerated for another 22.5 years, we could reach any galaxy within the magenta circle, even in a Universe with dark energy, but nothing outside of it.

E. Siegel, based on work by Wikimedia Commons users Azcolvin 429 and Frédéric MICHEL

Beyond a certain distance, we can see some of the light that was already emitted long ago, but will never see the light that is being emitted right now: 13.8 billion years after the Big Bang. Beyond a certain specific distance — calculated (by me) to be approximately 18 billion light-years away at present — even a signal moving at the speed of light will never reach us.

Similarly, that means that if we were in an arbitrarily high-powered rocket ship, all of the objects presently contained within this 18 billion light-year radius would be eventually reachable by us, even as the Universe continued to expand and these distances continued to increase. However, the objects beyond that would never be reachable. Even as we achieved greater and greater distances, they would recede faster than we could ever travel, preventing us from visiting them for all eternity. Already, 94% of all the galaxies in the observable Universe are beyond our eternal reach.

As vast as our observable Universe is and as much as we can see, it’s far more than we can ever... [+] reach, as only 6% of the volume that we can observe is presently reachable. Beyond what we can observe, however, there is certainly more Universe; what we can see represents only a tiny fraction of what must be out there.

NASA, ESA, R. Windhorst, S. Cohen, and M. Mechtley (ASU), R. O’Connell (UVa), P. McCarthy (Carnegie Obs), N. Hathi (UC Riverside), R. Ryan (UC Davis), & H. Yan (tOSU)

And yet, there is a different “edge” that we might want to consider: beyond the limits of what we can observe today, or even what we can potentially observe arbitrarily far into the future, if we run our theoretical clock towards infinity. We can consider how large the entire Universe is — the unobservable Universe — and whether it folds in on itself or not.

The way we can answer this is based on an extrapolation of what we observe when we try to measure the spatial curvature of the Universe: the amount that space is curved on the largest scale we can possibly observe. If the Universe is positively curved, parallel lines will converge and the three angles of a triangle will sum to more than 180 degrees. If the Universe is negatively curved, parallel lines will diverge and the three angles of a triangle will sum to less than 180 degrees. And if the Universe is flat, parallel lines will remain parallel, and all triangles will contain 180 degrees exactly.

The angles of a triangle add up to different amounts depending on the spatial curvature present. A... [+] positively curved (top), negatively curved (middle), or flat (bottom) Universe will have the internal angles of a triangle sum up to more, less, or exactly equal to 180 degrees, respectively.

NASA / WMAP science team

The way we do this is to take the most distant signals of all, such as the light that’s left over from the Big Bang, and examine in detail how the fluctuations are patterned. If the Universe is curved in either a positive or a negative direction, the fluctuation patterns that we observe will wind up distorted to appear on either larger or smaller angular scales, as opposed to a flat Universe.

When we take the best data available, which comes from both the cosmic microwave background’s fluctuations and the details of how galaxies cluster together on large scales at a variety of distances, we arrive at an inescapable conclusion: the Universe is indistinguishable from perfect spatial flatness. If it is curved, it’s at a level that’s no more than 0.4%, meaning that if the Universe is curved like a hypersphere, its radius is at least ~250 times larger than the part that’s observable to us.

The magnitudes of the hot and cold spots, as well as their scales, indicate the curvature of the... [+] Universe. To the best of our capabilities, we measure it to be perfectly flat. Baryon acoustic oscillations and the CMB, together, provide the best methods of constraining this, down to a combined precision of 0.4%.

Smoot Cosmology Group / LBL

If you define the edge of the Universe as the farthest object we could ever reach if we began our journey immediately, then our present limit is a mere distance of 18 billion light-years, encompassing just 6% of the volume of our observable Universe. If you define it as the limit of what we can observe a signal from — who we can see and who can see us — then the edge goes out to 46.1 billion light-years. But if you define it as the limits of the unobservable Universe, the only limit we have is that it’s at least 11,500 billion light-years in size, and it could be even larger.

This doesn’t necessarily mean that the Universe is infinite, though. It could be flat and still curve back on itself, with a donut-like shape known mathematically as a torus. As large and expansive as the observable Universe is, it’s still finite, with a finite amount of information to teach us. Beyond that, the ultimate cosmic truths still remain unknown to us.

In a hypertorus model of the Universe, motion in a straight line will return you to your original... [+] location, even in an uncurved (flat) spacetime. The Universe could also be closed and positively curved: like a hypersphere.

ESO and deviantART user InTheStarlightGarden

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Ethan Siegel Ethan Siegel

I am a Ph.D. astrophysicist, author, and science communicator, who professes physics and astronomy at various colleges. I have won numerous awards for science writing since 2008 for my blog, Starts With A Bang, including the award for best science blog by the Institute of Physics. My two books, Treknology: The Science of Star Trek from Tricorders to Warp Drive, Beyond the Galaxy: How humanity looked beyond our Milky Way and discovered the entire Universe, are available for purchase at Amazon. Follow me on Twitter @startswithabang.

Source: How Far Is It To The Edge Of The Universe?

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Can We Really Use The Moon’s Billion-Year Old Water To Make Rocket Fuel And Open Up The Cosmos?

The moon has water. That’s great news for a future moon-base, but it’s also often talked-up as a resource for creating rocket fuel. Last week NASA announced that it would send a mobile robot, the Volatiles Investigating Polar Exploration Rover (VIPER) to the South Pole of the Moon to find the exact location and concentration of water ice in the region. “The key to living on the Moon is water—the same as here on Earth,” said Daniel Andrews, project manager of the VIPER mission and director of engineering at NASA’s Ames Research Center in Silicon Valley. “Since the confirmation of lunar water-ice ten years ago, the question now is if the Moon could really contain the amount of resources we need to live off-world.”

Another theory goes that if we can use the water on the moon—which is locked-up as ice, but we’ll worry about that later—to power spacecraft, they will be able to go way, way further into the cosmos and kick-start a new era of interstellar mining. Water on the moon would make future Mars missions more affordable and could fuel commercial enterprises that link Earth and the Moon. “Creating space fuel depots would allow spacecraft to travel much farther and allow missions and satellites to sustain operations,” says Karen Panetta, IEEE Fellow, Dean for Graduate Education, Tufts University. “Rather than transporting water into space in heavy loads on rockets, the goal is to extract it (mine it) from the moon and asteroids.” It would also mean rockets don’t have to expend a lot of fuel just to get the fuel for their entire up into space with them. Launch costs would plummet.

Today In: Innovation

Wait. Water into rocket fuel? Surely you cannot fuel a rocket with water; liquid-fuel rockets use liquid oxygen and either kerosene or liquid hydrogen. Ah … oxygen and hydrogen.

So what’s the science behind making rocket fuel from moon-water and asteroid-ice?

How do you make rocket fuel from water?

“Water—h2o—consists of hydrogen and oxygen, which can be refined into high-efficiency fuel,” says Panetta. It’s all about water electrolysis, a technique that uses an electric current (in space, from solar panels) to break down compounds and convert them into something else. In this case, hydrogen fuel. “Electrolysis is one approach that has been used in space to separate h2o to provide oxygen supplies for manned space missions, which helped alleviate the need for high-pressure oxygen storage tanks,” she says. On the International Space Station astronauts use electrolysis to split oxygen from hydrogen in water.

Why don’t we already make rocket fuel from water on Earth?

We could, but water is a precious commodity on Earth. It’s also not economical, and in any case, we’re talking about pretty small amounts of fuel needed by spacecraft. “Propelling an object in zero gravity doesn’t need much fuel, so water offers a viable solution in space,” says Panetta. However, water molecules are already used in many launch systems, albeit in their cryogenic liquid state to increase their density. “Couple this with solar energy for reliable power and it opens up new avenues for not just space exploration, but also for autonomous mining operations,” says Panetta.

Yup—autonomous mining is what the “water into rocket fuel” debate is really all about.

How water-ice at the moon’s South Pole will be ‘mined’

Get ready for autonomous robots on the moon. A lot of work will be needed on developing reliable autonomous mining techniques for docking, drilling, detecting and repairing equipment. “The robots will use artificial intelligence to gather information and communicate among each other what they learn, so each robot doesn’t have to relearn everything from scratch, but rather, just upgrade their knowledge and data models,” says Panetta.

How old is the water-ice at the Moon’s South Pole?

A new study published in the journal Icarus suggests that while a majority of those deposits are likely billions of years old, some may be much more recent. While most of the ice deposits are in patches on the floors of large craters formed about 3.1 billion years or longer ago, the researchers also found evidence for ice in smaller and relatively young craters. It’s argued that older ice could have been sourced from water-bearing comets and asteroids hitting the moon, while newer water-ice might come from bombardment from pea-sized micrometeorites.

What about mining asteroids? 

The technology is likely to be perfected on the moon. “Landing and taking off again from an asteroid adds another dimension of challenges,” says Panetta. However, asteroids are a much more exciting prospect. “C-type asteroids contain potentially up to 20% water by mass and will be good targets for mining (and) M-type asteroids contain structural metals like iron, nickel and cobalt which can be used to build structures in space using 3D printing,” says Panetta. It would therefore be possible to fabricate spare parts on site from mined materials, allowing robots to repair each other and drilling equipment.

As natural resources become depleted on Earth, successfully mining and transporting them back could become big business.

Is any of this going to happen soon?

That depends on technology. “The combination of solar energy, artificial intelligence, robotics and materials science are truly responsible for enabling mining in space to become a reality,” says Panetta. “Don’t be surprised if the first successful mining operation on the moon is announced within the next five years.”

Wishing you clear skies and wide eyes.

Follow me on Twitter. Check out my website.

I’m an experienced science, technology and travel journalist interested in space exploration, moon-gazing, exploring the night sky, solar and lunar eclipses, astro-travel, wildlife conservation and nature. I’m the editor of WhenIsTheNextEclipse.com and the author of “A Stargazing Program for Beginners: A Pocket Field Guide” (Springer, 2015), as well as many eclipse-chasing guides.

Source: Can We Really Use The Moon’s Billion-Year Old Water To Make Rocket Fuel And Open Up The Cosmos?

70.6K subscribers
NASA is sending a mobile robot to the south pole of the Moon to get a close-up view of the location and concentration of water ice in the region and for the first time ever, actually sample the water ice at the same pole where the first woman and next man will land in 2024 under the Artemis program. About the size of a golf cart, the Volatiles Investigating Polar Exploration Rover, or VIPER, will roam several miles, using its four science instruments — including a 1-meter drill — to sample various soil environments. Planned for delivery in December 2022, VIPER will collect about 100 days of data that will be used to inform development of the first global water resource maps of the Moon. Learn more: https://www.nasa.gov/feature/new-vipe… Video credit: NASA/Ames Research Center The video may be downloaded at: https://images.nasa.gov/details-ARC-2…

Last Seen In 1986, Halley’s Comet Will Make Its Presence Known This Week With Shooting Star Show

Will you be alive in 2061? If not, your only chance to see something of Halley’s Comet comes in both early May and late October each year when Earth moves through streams of particles the great comet deposited in the solar system in 1986.

As those particles hit Earth’s atmosphere they energise and glow for a millisecond, something that happens as many as 40 times per hour to create a meteor shower. That’s what is happening on Monday/Tuesday as the Orionid meteor shower peaks after midnight.

What has Orion got to do with this meteor shower?

Technically speaking, nothing whatsoever. The Orionid meteor shower gets its name from the constellation its shooting stars appear to come from—Orion the Hunter. Astronomers call this the “radiant point”, which more precisely is close to an open cluster of stars called Collinder 69. A lovely sight though binoculars and easy to see with the naked eye from a dark sky site, Collinder 69 can be found just above Orion the Hunter’s head. However, just look in the general direction of Orion’s Belt and you’ll see any shooting stars from the Orionid meteor shower.

Today In: Innovation

When, where and how to see the Orionids?

Although it runs from October 2 through November 7, the night to watch for shooting stars from the Orionid meteor shower is Monday through Tuesday, October 21 and 22, 2019. The best time will be after midnight when your location will be on the nightside of Earth. A lawn chair or deckchair is perfect for watching meteor showers, though the best advice is always to wrap up warm and let you eyes adjust to the dark and just watch the night sky (in this case, look generally southeast towards Orion). Whatever you do don’t stop looking, and absolutely do not look at your smartphone. Its white light will instantly kill your night vision.

Visible from both hemispheres, the Orionids—and any moonless meteor shower—is best enjoyed under a dark country sky. If that’s not going to be possible, make sure there are no artificial lights in your line of sight, and even better, find a place in shadow from any artificial lights.

How to find a dark sky

About 40km from a town is where to go. Here are some great resources to help you find a dark sky near you:

What is Halley’s Comet?

Every 75 years a 15x8km comet enters the solar system and becomes visible to the naked eye from Earth. The only known short-period comet that can be seen twice in one lifetime (if observed when very young), its arrival was first predicted by British astronomer Edmond Halley, who calculated that it would appear in 1758. It duly did, though 16 years after his death. Halley also discovered that transits of Mercury and Venus across the sun could be used to calculate the size of the solar system.

When is the Halley’s Comet meteor shower in May?

That would be the Eta Aquarids, a meteor shower that will peak on May 5/6 in 2020, though it’s not as dependable a meteor shower as the Orionids.

Wishing you clear skies and wide eyes.

Follow me on Twitter. Check out my website.

I’m an experienced science, technology and travel journalist interested in space exploration, moon-gazing, exploring the night sky, solar and lunar eclipses, astro-travel, wildlife conservation and nature. I’m the editor of WhenIsTheNextEclipse.com and the author of “A Stargazing Program for Beginners: A Pocket Field Guide” (Springer, 2015), as well as many eclipse-chasing guides.

Source: Last Seen In 1986, Halley’s Comet Will Make Its Presence Known This Week With Shooting Star Show

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The Halley Armada, Giotto, Vega 1 and 2, Suisei and Sakigake, all visited Halley’s Comet at roughly the same time in 1986. What did they discover? Why was this such a groundbreaking mission? https://brilliant.org/astrum/ ************** A big thank you to Brilliant for supporting this video. Sign up for free using the link above. That link will also get the first 200 subscribers 20% off a premium subscription to the website if you like what you see. ************** Looking for the Astrum Hindi Channel? https://www.youtube.com/channel/UC0Y6… SUBSCRIBE for more videos about our other planets. Subscribe! http://goo.gl/WX4iMN Facebook! http://goo.gl/uaOlWW Twitter! http://goo.gl/VCfejs Donate! Patreon: http://goo.gl/GGA5xT Ethereum Wallet: 0x5F8cf793962ae8Df4Cba017E7A6159a104744038 Become a Patron today and support Astrum! Donate link above. I can’t do it without you. Patreons can help pick the next Astrum Answers in a fortnightly poll. Thanks to those who have supported so far! Image Credits: NASA/ESO/ESA/ISAS/VEGA Music Credits: Stellardrone – Cepheid Stellardrone – Billions and Billions
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