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how many stars are there in the universe that we know?
no one knows how many stars there are because space in rapidly growing as we know it

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Q2-Why is light from a supernova dangerous?
It depends on what you mean by "dangerous." If you mean "can kill you in an instant  it's dangerous. One blast  of a supernova can outshine through out the GALAXLY.

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Q:Why is their no oxygen or air in space?

A: In space, light gases like helium and hydrogen are most common. Air thins as you go up in altitude because the majority of air is held close to the earth's surface by gravity.

But gases and dust particles still float around space.

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Why Isn't Pluto Included As A Planet?

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Q: Was Pluto ever a planet?
A: We thought Pluto was a planet until we got closer to it and realized that it was a dwarf planet

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how many stars are there in the universe our that we know if.
Answer
we know that there are 100 billion star in the universe.

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what cause's space to rapidly expand
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imagine jumping into a pool of water, little ripples go outwards in all directions. in space its like this but instead of a pool its a "big bang" and these ripples are infinite the further they travel the bigger the universe gets!

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Why do you age quicker when your in space? So depending on our position and speed, time can appear to move faster or slower to us relative to others in a different part of space-time

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how big are stars?
This star has about 12% the mass of the Sun, and about 14% the size of the Sun – about 200,000 km across, which is only a little larger than Jupiter. Our own Sun is an example of an average star.

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Question:
how long dose it take to make a rocket?

Answer:
this depends on the type of rocket, will it carry people or not. a simple rocket like the falcon 9 from space X. it may take 18 months to make, but one that can take people into outer space, like the shuttle, can take 5 years to make, start to finish.

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Is it possible to travel so fast to distort the space around you? Number 2: How many years would it take us at the fastest speed possible right now to leave the milky way Galaxy

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What is on the other side of a black hole

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Q: Could you travel through a worm hole?
A: No, Because traveling through a wormhole defies the laws of physics in many ways. If we tried to go through one then it would just collapse and destroy anything in it. To go through it we would need an anti-gravitational device of sorts.

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How Are Galaxies Made?

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What happens if the Earth had no Moon

A. If there was no moon venus would be the next brightest thing at night but venus would'nt be bright enough to see in the sky and the 24 hr day would be turned in to a 6-12 hour day

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QUESTION 1: If the sun didn't exist, what would happen to earth and all the other planets in our solar system?
ANSWER: planets would fall out of alignment and moving things like comets or asteroids would stop heading towards the direction of the sun, instead they would go in a straight line into space. Everyone in earth would freeze to death but, as light from the Sun takes eight and a half minutes to reach us, we’d have a final few moments of glorious sunshine before our planet was covered in darkness.
QUESTION 2: I know that Jupiter has at least 53 moons, would this effect this planet and how?
ANSWER: Jupiter's gravity causes tides (caused by its many moons) in the solid surface that rise 100 m (300 feet) high

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How do shooting stars form?
Answer: Shooting stars are formed by tiny bits of dust and rock called meteoroids that fall into the earths atmosphere that is burning.

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Q. How much does it cost to launch a space shuttle?
A. The average cost to launch a Space Shuttle is about $450 million per mission.

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If planets stopped moving, would time still exist?
No, because

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lQ: how do blackhole form.

A: Blackholes are formed when a massive star collapse upon itself.
Fun Fact: when a massive star collapse it will cause a supernova or a explosion.

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Did NASA actuality launch the first mission to walk on the moon, or was it faked?

A: It is not certain and there are lots of rumors about it but most people think they were real since it would have cost alot of money to create a fake landing and film it.

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How do Satellites help us on earth?
Satellites looking toward Earth provide information about clouds, oceans, land and ice. They also measure gases in the atmosphere, such as ozone and carbon dioxide. Satellites monitor wildfires, volcanoes and their smoke.
Source: https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-a-satellite-58.html

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Q: what happens when you go into a black hole?

A: gravity will drag you toward it at the speed of light and will instantly rip you to shreds. astrophysicists suspect that Earth will breaks down inside of a black hole. You will die regardless of what size of black hole you enter because there are big and small ones

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Q. is there life outside of earth ?

A. NASA say's that there are said to be billions of planets in our galaxy and that every star has a planet. They also say they that through today's telescopes we can tell from the distance between the star if the planet has liquid water or not.

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Q:Why do you age or get younger in space?

A:So depending on our position and speed, time can appear to move faster or slower to us relative to others in a different part of space time.
This also happens in a plane.

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Q: How do planets form.
A: A planet form from a collapsing cloud of dust and gas within a larger cloud called a nebula.

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s there life on mars?

To date no proof has been found of past or present life on mars. However, evidence is now building that the ancient surface environment of mars had water and may have been liveable for microorganisms. The existence of liveable conditions does not always show the presence of life.

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how are stars formed
answer:
stars are formed by gas and dust bind together at extreme temperatures of 10 to 20k - just above zero.

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Q: How long will it take to travel a light year using earths latest technology?
A: 21,500 years going at 33,000 MPH!

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Time to Take Out the Space Trash – BBC Newsnight

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Scientists are warning there's now so much space debris in low earth orbit that action needs to be taken, so next year a new mission plans to boldly go where no refuse collection has gone before. Science correspondent Rebecca Morelle reports.

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The edge of space - James May on the Moon - BBC

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James May finally reaches the edge of space, where he looks down at the curvature of the earth, and upwards into the black infinity of space. Subscribe to the BBC Worldwide channel: http://www.youtube.com/subscription_center?add_user=BBCWorldwide BBC Worldwide Channel: http://www.youtube.com/BBCWorldwide This is a channel from BBC Worldwide who help fund new BBC programmes.

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Bill Nye the Science Guy S05E02 Space Exploration

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Bill Nye Science Guy Episodes english full episode video review new episode 1 season tv series tv show animated series 2015 2016 2017 funny song dance moments Please Like the video and Subscribe for new videos

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Where the Wonders of Learning Never Cease

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is space infinite? there are two possiblities exist: either the universe is finite and has a limit of space, or it's infinite and goes on forever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever and ever. Both possibilities have super weird and weird stuff information.

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What would happen if there was no sun?
The moon would vanish and the earth would freeze.

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Watch more at http://pbs.org/yearinspace Tweet this ⇒ http://bit.ly/OKTBSyis Share on FB ⇒ http://bit.ly/OKTBSyisFB ↓ More info and sources below ↓ Dig deeper: National Research Council. "Space Radiation Hazards and the Vision for Space Exploration: Report of a Workshop." Washington, DC: The National Academies Press, 2006. doi:10.17226/11760. NASA Facts "Understanding Space Radiation" http://spaceflight.nasa.gov/spacenews...

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Q: How fast does the Universe expand and why does it expand?
A: The Universe expands really fast. If a planet was a megaparsec (about 3.3 million light years away ) it would be expanding away from us at 68km a second. This is because space is expanding everywhere and that means planets that are further away seem to be moving away from us faster than closer ones. In 1999 astronomers when astronomers were trying to find out how the Universe was going to stop they found out about dark energy. Imagine the begining of the universe it went BOOM like a gun but instead of a gun it was like a rocket and the universe is still expanding because it still has energy from the begining of the universe.

https://www.universetoday.com/116229/whats-causing-the-universe-to-expand/

https://www.universetoday.com/118785/how-fast-is-the-universe-expanding/