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 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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How can we define a event that happened in space? [closed]

I am a high school boy reading about space, and about planets, and asteroids. While reading about them, a question comes to mind. Suppose there is a collision between two asteroids in space, how do ...
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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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105 views

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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80 views

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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1answer
624 views

Is there any habitable exoplanet around Tau Ceti?

I was wondering.. is there any habitable exoplanet around Tau Ceti?
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1answer
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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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1answer
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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 ...
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Is the shape of observable universe and shape of space same?

I have read that Euclidean space is considered as flat space and Minkowski space is flat space-time. So when we say our observable universe is flat are we saying that the space is flat or space-time ...
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Can I slice off a piece of the Sun?

Bear with me. I want to explain this to my 6 and half year old. If, all things being equal, we could reach out to the Sun with a suitable implement, a gigantic space knife, could we cut a piece off ...
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Which space telescope is the most distant?

From the earth, and from the sun. Only interested in active, operational ones.
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What would happen if we released water into deep space?

If we went to deep space by a spacecraft and released water into space, what would happen? Would the water freeze to ice or would it remain as a liquid?
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What should I expect to see with my telescope with what EP's?

Recently got a Celestron 130 SLT (first "real" scope) and have a question. I have the following: 130mm F/5 newtonian, 650mm focal length scope 9 and 25mm factory EP's (more on that later) Svbony 2x ...
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How do we define temperature in outer space?

I was recently reading an article on space.com about : What's the Temperature of Outer Space. They said : Some parts of space are hot! Gas between stars, as well as the solar wind, both seem to be ...
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How can we ge to the exoplanet Proxima b? [closed]

I would like to know please how can we get to the exoplanet Proxima b. I heard it is the potentially habitable exoplanet closet to Earth at only 4.2 light years away. So exciting!
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What happens to organic material in space [closed]

Since there is no bacteria and oxygen in space, what will happen to a dead chicken's body if released into space? Assuming it's far enough for any nearby planet to collide with, will it rot? Freeze ...
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What would be the result if an asteroid collides with a space station? [closed]

What are the consequences going to be if an asteroid or a celestial body collides with a space station rotating on Earth orbit?
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Star map, where?

I have been looking at the website https://thenightsky.com and wanted to create a star map my self, from a specific place on a specific date. Where would I be able to find this?
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Is it relevant to ask the limits of space? [duplicate]

Yesterday I watched "The Orville" episode 4 and there was interesting moment where a kid and old man saw the space for the first time. Kid: What is this? Capitan: Kid, that is space. Old ...
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If universe is expanding why is the distance between planets not increasing?

General relativity tells us space is expanding.Then why does the distance between planets and heavenly bodies increase?
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Does Absolute Velocity Exist?

It seems everyone is on the same page about there being no "absolute velocity" due to the fact that everything is relativistic. However, this leaves me confused. This seems to be disconnected with the ...
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The photos of the outer space

How did the humans take photos for the galaxies, black holes, stars, nebulas etc in the outer space?! I guess they went out of the Earth planet and nearly out of the Milky Way galaxy by space-ships ...
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Does space not make sound, or can we just not hear it? [duplicate]

This is a question regarding sound waves and space. I know that sound waves must travel through a medium "air", enter our brains, and then we can decipher what exactly the sound is. But in space, ...
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Does the Sun have any atmosphere?

Does the Sun have any atmosphere of its own? Is it just like the atmospheres that the planets have.