Questions tagged [space]

The near-vacuum extending between the planets and stars, containing small amounts of gas and dust. Also called outer space to refer to the physical universe beyond the Earth's atmosphere.

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What was the train of lights (30+ in a row) that went south toward north then disappeared tonight in Turnersville Texas? [duplicate]

The lights were bright and looked like stars that moved together in unison in the formation of a Double forward slash Ex: // but nearer together made up of (I’m guessing from what I saw)at least 30+ ...
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Is it true that star treks 'Klingons', come from Uranus? [closed]

Is it true that star trek's 'Klingons', come from Uranus? i'm asking for a friend... a non-believer science guy, who drinks too much and smokes a lot of weed. :)
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How accurately could late 50s - early 60s humans have mapped the solar system?

What if early SETI investigations had focused on our own solar system, rather than distant stars? Given the technology that existed around the 1950s, how much surveillance would humanity be able to do?...
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I've seen something Incredible in the sky and really need help identifying what it is! [closed]

It was about 4 A.M. in North Wales and I was getting bored of what ever I was doing so decided to look out the window. I really love looking at the stars but this time it was different. The sky seemed ...
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Has the idea of sending human heads instead of entire human bodies been considered in space exploration? [closed]

What makes human space exploration very difficult is the infrastructure require to support a human body outside earth. It must be researched, developed and tested thoroughly which can take many years ...
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Picking two random points in space and drawing a line between them, what is the chance the line intersects anything?

I thought of this question after pondering how most of the observable universe is observable. If we can observe it, then the space between us and that object must have been unoccupied to allow the ...
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Why is the position of the Sun so fixed? [duplicate]

Please correct me if I tell something wrong. As we already know, a planet (e.g. Earth) remains on its orbit due to the gravity of the Sun. If the Sun's gravity were not there, the Earth would be ...
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Is it possible to use the vacuum of space to help with pollution [closed]

Would it be possible to use a pipeline from the ground and uses the vacuum of space to dispose of things that are hazardous to the environment? (Liquid waste in particular comes to mind) Essentially ...
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What would happen if you jumped out of a moving spacecraft? [closed]

I've watched a film where one of the characters claimed to have rapidly disembarked a moving spacecraft during a 5g burn (?!) and immediately wondered how he survived. For example, you're on a ...
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Definition of space - to cope with “space expansion”

I've searched quite a lot but found no satisfying definition, so please: How do we actually define space when talking of "space expansion"? Isn't it just a metric, a dimension we measure, instead of ...
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How can comets have tails if there's no air resistance in space?

I understand that solar radiation causes material to vaporize out of a comet into dust but why does the dust then trail behind the comet like a "tail"? Assuming gravity is the only applied force ...
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Was it a space station?

I just looked at the sky and saw a star, not so bright but moving very fast and in almost a minute it disappeared, as it was so fast. Timing was in between 9.35-9.45 PM in Nuremberg, Germany. My ...
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Galaxies stay at same place but it's the space that splits the galaxies apart [duplicate]

Galaxies stay at same place but it's the space that splits the galaxies apart. Is my understanding correct? As per my understanding. Galaxies moving apart at high speed is due to the increase in ...
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If a black hole pulls every object in the universe, why there is a light around it?

I've seen some black hole images and I've seen some movies about it e.g(interstellar). I wonder why it has a light around it. Even if I know that light can't escape through it. Can someone enlighten ...
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Underground sea in Titan(Saturn's moon), water or hydrocarbons?

Is the underground sea on Titan formed of water or hydrocarbons. Is anyone certain? I have read a lot of various documents from NASA and Cassini missions and Huygens missions, and I have become ...
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How long could an ocean last in space?

If all of Earth's oceans were suddenly moved into outer space, how long would it take for them to evaporate? My understanding is that water evaporates straight away in space... but what about when it'...
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Space telescope located in outer solar system

I want to pose a question from someone who's astronomy knowledge would fit neatly onto a single piece of paper so please bear this in mind with any comments or answers. I am interested and want to ...
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What is the horizontal distance needed to observe an object just as badly as if it where in space at the zenith?

When I see an object in space (let's say the ISS) above my head, my line of sight traverses ~$100\; km$ of atmosphere. The vast majority of the extinction, absorption and turbulence happens closer to ...
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Force exerted by space debris on satellites

Hypothetically, if space debris were to collide with the currently orbiting satellites, how much force would they exert, and how much damage would they make? Will the satellites be able to withstand ...
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The origins of Dark Matter/Dark Energy

Layman here with an affinity for astronomy, space and everything associated with it. I'm a big fan of the space oriented programs on the Discovery and Science channels and I was watching an episode ...
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Starting a fire in a cold planet that was full of flammable gas

What would happen to a cold planet that has a large amount of flammable gas, like Neptune, if we throw some fire into it? Will it burn, or would the flame be extinguished due to the cold?
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Why was Dawn's (the spacecraft) flight path circular? [closed]

In comparison to the twin Voyagers, Dawn's flight path circled the sun in an anti-clockwise manner. The map of its path shows its targets, Ceres and Vesta were in a trajectory that was close to a ...
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What is this object in this photo? [closed]

i took it and i don't know what planet or star is this and also there's our moon
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Latest Planet Collision 2019 [closed]

Scientist says that during the course of their billions of years, the planets collied with each other in the past. My question is: is there any latest or recent planetary collision in recent times?
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Attach a visible light telescope to the outside of the ISS

Visible light imaging of the heavens is limited on Earth primarily due to the atmosphere. I know the ISS is moving at 17000mph, but given the delays to the James Webb telescope, is there any merit in ...
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Is the newly discovered exoplanet 'Teegarden b' habitable?

A new exoplanet has been just discovered around the star Teegarden, at only 12 light years away.
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If the space is expanding near the speed of light or the speed of light, why Andromeda is approaching or coming near to our galaxy (Milky way)? [duplicate]

Space with distance of 1megaparsec is expanding with rate of 70km/s, and if space with a distance of 4296 megaparsec is expanding at rate of 300,720km/s, then why Andromeda is coming to us? Even there ...
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Water vapour in space

This question is inspired by, but different from, What happens if an ice cube is left in space? Mark's accepted answer says "…if you stick your ice cube out in the Oort Cloud, it'll grow: the mean ...
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Birth of the Gas Giant Planets?

How does a gas giant planet form like Saturn and Jupiter, and why just gas? Why didn't they form any solid surface?
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Agena docking in First Man [closed]

In the movie, First Man Neil Armstrong and his colleague David Scott, as part of the Gemini 8 program, attempt to dock with the Agena. But it turns out to be disastrous as they go into a continuous ...
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As the Universe expands, do things like planets expand also, or just the space in between?

Just what the question says. As the universe expands, and space expands, do objects like planets ever expand? Does the space INSIDE of those objects expand?
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Why do astronauts move so slowly in zero gravity? [closed]

When astronauts are floating about in a spaceship or space station, they nearly always move very slowly. After doing a bit of research I can't see why being in zero gravity would restrict movement to ...
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Why does gravity make time go slower and warp light?

I know that objects with lots of gravity are capable of warping light or slowing time (an example being a black hole). I also know this is because of the theory of relativity, but I need someone to ...
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Why are there no stars visible in cislunar space?

It’s very puzzling that the moon landing had no stars in the background, the ISS clips have no stars in the background. I listened to multiple astronaut interviews speak on what it looks like up in ...
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What fills the new space created during expansion?

Does it remain void and pushes even more or will virtual particles eventually create normal matter?
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Vacuum of space [closed]

Firstly I’m genuinely interesting in a working explanation for this question. It is for this reason that I am editing the question to fine tune the question. In essense the question has remained the ...
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3answers
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Is space a thing? [closed]

Based on my extent of knowledge relating to astrophysics, I once thought space is a thing, which can be twisted a long side with Time regarding masses of objects(According to relativity theory). But ...
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Who was the first to realize that the Earth is surrounded by vacuum? [closed]

My question isn't about the arrangement of planets in space (geocentrism / heliocentrism), nor the understanding of the whole universe (we are in a galaxy, there are galaxies etc). My question is: who ...
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Is there any habitable exoplanet around Tau Ceti?

I was wondering.. is there any habitable exoplanet around Tau Ceti?
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How to convert factors of time dilation into something relatable? [duplicate]

On this post, Time according to the gravity of Sagittarius A? They found the factor of time on the varying distances from the SMBH, I am curious on how to turn those factors into relatable terms ...
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How much of the Universe is subatomic? [closed]

How much does subatomic particles such as photons, tachyons, and electron being the biggest particles etc. occupy space? If put in a ball how big of a ball would that be?
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C-Type Asteroids and Carbonaceous Chondrite Meteorites

I was just wondering, what is the relationship between C-type asteroids and carbonaceous chondrite (CC) meteorites? Do CC meteorites come from C-type asteroids?
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Site to see direction to the Voyager by entering time and coordinates of my position on the Earth? [closed]

Where is Voyager relative to me right now in realtime?
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How did space start?

How did this 'black fabric' that we call space start? How was it made? How was the initial singularity formed? How did the first atom come into existence? If it all started from a tiny particle that ...
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Strange bright light in the sky flying fast [closed]

I was out with my dad on our porch watching the stars with our telescope. after awhile of looking and taking pictures I noticed something strange in the sky. There were two airplanes flying close to ...
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With all the stars in the universe, why isn't the sky saturated with light? [duplicate]

Space is dark. But if we direct telescopes to seemingly dark portions of sky, we see that it is filled with galaxies. If the universe is theoretically infinite, wouldn't an infinite number of photons ...
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Is a General Relativity approximation available in Universe Sandbox (1 or 2)?

This answer points out that including General Relativity in a simulation can be computationally intensive and may not be present in Universe Sandbox. However, answers to How to calculate the planets ...
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Will the TESS telescope be much better than the Kepler telescope?

I would like to know please whether or not the TESS telescope will be much better than the Kepler one. Thanks.
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What would happen to a polished marble statue left in space for a million years?

Consider it doesn't collide with any other objects. Would it be preserved perfectly in the vacuum or would its surface be damaged by anything like UV rays, radiation, gas, space dust, etc?
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In a planetary system close to the galactic core, would it be possible to see the supermassive black hole?

I understand that radiation on planets near the galaxy’s center make life on these planets nearly impossible, and that one cannot truly “see” a black hole. However, if you could stand on the surface ...