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Many perceive the universe to expand like a balloon, and we would be somewhere inside the balloon. However, the reality is closer to that we are on the surface of the balloon, all moving away from each other at a constant rate. Because of this, anywhere in the universe could be considered the center.

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Quasars are supermassive black holes that are found in the center of galaxies. The light that we see orbiting them is called an accretion disk. This is caused by matter orbiting the black holes so fast that it causes friction and therefore light. Because of their size, they posses immense gravitational pull.

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pluto has 5 moons

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while watching people play minecraft I learned that there 3 types of black holes.

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Quasars are powered by supermassive black holes at the centers of galaxies. Material falling into these black holes releases huge amounts of energy, causing the quasar to shine extremely bright. Quasars are located billions of light years away from Earth, meaning that scientists see them as they appeared billions of years ago. This allows quasars to give us information about the early universe. Quasar light shows evidence of elements like hydrogen, helium, carbon and oxygen, indicating that elements were already forming in the early universe. The most luminous quasars can shine with the power of thousands of galaxies combined, making them some of the brightest objects in the universe. The first quasars were discovered in the 1960s. Since then, over 100,000 quasars have been cataloged. Researchers believe quasars were more common in the early universe.

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space is cool

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There are 2 types of star clusters: open and globular. Open star clusters generally have 50-500 stars while globular ones can have up to 10 mill stars in them. Open star clusters are generally very "young" (around 100 thousand to a few million years old). Globular star clusters will be a lot, lot, older at around 12 billion years. Famous examples include matariki and jewel box for open and M22and M68 for gobular.

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Alpha centauri is the closest star to earth (apart from the sun) but is still many light years away.

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Black holes have a very strong gravitational pull that sucks everything around it, pulling it in. Not even light can escape a black hole.

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When something orbits something so when a moon orbits a planet, its when it moves around the planet.

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UY Scuti is the biggest star humans know about, It is 1700 time bigger than our sun.

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Pluto has more moons than earth because earth's bad

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Summer Solstice is the longest day of the year, Winter Solstice is the shortest day of the year.

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Gas giants:
Jupiter is the largest planet in our solar system. It is well recognised for its storm, The Great Red Spot. It is estimated that Jupiter has around 80~95 moons.
Saturn is the second largest planet and is known for its rings. All of the gas giants have rings, but none are nearly as significant as Saturns. Saturn has 146 moons, some of them being larger than Mercury.
Uranus is the seventh planet and has 27 known moons. It is smaller than Jupiter or Saturn, and is composed of ice, rock and gas. Uranus and Neptune are also known as 'Ice Giants'.
Neptune is the eighth and farthest planet from the sun. It is the coldest planet in our solar system and is the densest giant planet.

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Terrestrial (solid) planets:
Mercury is the smallest planet in our solar system, and is the closest to the sun.
Next is Venus, which is the planet with the highest temperature, despite not being the closest to the sun. This is because it has an atmosphere made of carbon dioxide and acid clouds which trap heat.
Earth is the only (known) habitable planet, has one moon and is similar in size to Venus.
Mars is the last terrestrial planet. It is slightly smaller than Earth, colder, and has two moons. Mars is one of the key interests of space exploration, due to the fact that it is 'closest to being habitable'.

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On Voyager 2 (I think) there was a disk inscribed with some drawings and there was a diagram of the 14 quasars closest to our sun. It was a sort of map to our solar system.

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Mercury, Venus, Mars, Earth, Saturn, Jupiter, Uranus, Neptune

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Orbit is when something goes around something else without using any power

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Light travels fast. Despite that, it takes 8 minutes for light from the sun to reach us. That means that the sun that we see was the sun 8 minutes ago, so stars that you see in the night sky could have exploded. If a star was one light year away than it would take one year for the light of that star to reach us.

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if a planet is 145,000,000 light-years away it would see earth in the cretaceous period

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The first person on the moon was actually niel armstrong and i was about to write that but alan said it was buzz alderin so i wrote buzz aldrin

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From my limited knowledge, Stephen hawking had a theory that black holes take two particles and occasionally only one particle gets taken in. I might have the details wrong.

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The first person to step on the moon was from America so it can't be andy. (I think his name is Buzz ALdrin or something)

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Venus is the hottest planet in our Solar System. One day in Venus is longer than one year on Venus, and almost all of the atmosphere on this planet is carbon dioxide.

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The sun's small for a star.

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The Wolf- Rayet star WR 102 is the hottest star known.

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Our Solar system has seven planets and a sun, which all of the planets orbit around. The planet names are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus.

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There are seven main types of stars

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About one million earths can fit into the sun

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The True Vacuum (or whatever its called)-Corey the Moray Eel

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The True Vacuum (or whatever its called)-Corey the Moray Eel

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The most probable end to the whole universe is called The True Vacuum. The True Vacuum is where a particle is created through means I forgor :skull: and will continue expanding, eating more energy. It is faster than light and could eat our whole Solar System in a blink of an eye. However, don't worry about this happening, as if it does happen, due to the sheer size, even though it moves so fast it'll take hundreds of millions of years to eat us, so, that's a problem for the future. :)

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A lot of astronauts come from ohio. (It's actually true)

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How to escape black holes (do not try at home)-Corey the Moray Eel

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How to escape black holes (do not try at home)-Corey the Moray Eel

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According to Stephen Hawking, there is a way to escape a black hole, but it takes billions of years. Basically, black holes will spit out a particle of energy for every two it takes in (or something like that), and if you wait long enough, it can eventually spit you out into little particles where someone can reconstruct you. This theory of black holes spitting out energy means that if it's true then if you had a mini-black hole, you could technically roast marshmallows over it! (Side not: just make sure not to make it eat up the whole planet.)

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Aliens are still debatable about if they are real or not. They are an alternate type of life, inhabit probably far-away planets and may have a very strange appearance. Aliens are still theoretical as we have never seen any type of 'alien' so far.

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How fast the universe is expanding and how long it's existed-Corey the Moray Eel

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How fast the universe is expanding and how long it's existed-Corey the Moray Eel

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The universe has existed for around 12 billion years and expands at the speed of light. So the universe is around 24 billion light years in diameter.

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Many planets like saturn and uranus have rings made out of random space stuff like dust.

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Supernovas is a process when a star dies and then it explodes in an area of dependence from what type of star it is. I don't know what difference it makes to be a different star. I do know though that when a supernova happens it releases a lot of radioactive energy and does a lot of damage to planets in its range.

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a long time ago people were dumb like me and thought the sun orbited earth

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Galaxies are combinations of space dust, gas and solar systems. The Galaxy we are in is called the Milky Way Galaxy and it is a spiral Galaxy. Spiral Galaxies usually have a blackhole in the center. Galaxies can also move, a particular Galaxy called the Andromeda Galaxy is approaching our Galaxy.

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You also definitely don't know venus is the hottest planet in the solar system and neptune's the coldest (I think).

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If you went in space without a spacesuit you'd probably die unless you're superman.

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Astronomy is the study of objects in space. A famous astronomer is galileo galilei.

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You definitely don't know that jupiter is the biggest planet in the solar system.

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according to a book earth takes around 23.8 hours to spin on its axis.

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The earth normally takes 365 days to orbit the sun, that's even longer than the time Jonathan Xu spends being smart.

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Galaxies is a combination of space dust, gas and solar systems like ours. We are in a galaxy called the Milky Way. Galaxies can have a supermassive black hole in the center and everything orbits around it.

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Closest to the Sun <- - - -> Farthest from the Sun
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

AKA. My Very Energetic Malamute Just Swam Until Nighttime
(Don't ask I read it in a random book)

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The sun's very big and even bigger than Jonathan xu's brain.

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According to a random book I read the earths core is hotter than the suns surface

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All of the names of the planets  except Earth  are named after the Roman gods and titans.

Mercury- The messenger god. God of commerce, communication and travel. Known as Hermes in Greek.

Venus- The beauty god. God of love and desire. Known as Aphrodite in Greek

Mars- The war god. God of rage, destruction and the spirit of battle. Known as Ares in Greek

Jupiter- The king of the gods. God of the sky, lightning and thunder. Known as Zeus in Greek.

Saturn- The king of the titans. God of time. Known as Kronos in Greek.

Uranus- The primal, first titan of the sky. Father of the titans. Sometimes spelled as Ouranos. Only planet that is named after a Greek god or titan. Known as Caelus in Roman.

Neptune- The god of the sea. God of waters, winds and storms. Known as the earthshaker because of his earthquakes. Known as Poseidon in Greek.

Pluto (not an official planet in our solar system now)- God of the underworld. God of the dead. Known as Hades in Greek.

Even some of the moons of the planets are named after gods, children of gods , servants of gods and many more Greek/Roman people.

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Satellites can be man-made or natural. Natural ones include the moon, and man-made ones are used to observe weather and are often used for weather forcasts.

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Astronomy is the study of non earth stuff.

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Earth has 1 moon, and even pluto has 2. Pluto>Earth

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The Universe is constantly expanding at the same rate.

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Stars are hot. When stars get old (or something like that) they explode.

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Some stars are part of things we call 'constellations'. They make a shape, and are often the basis for myths and the like.

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How Stars Change and other random stuff-Corey the Moray Eel

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How Stars Change and other random stuff-Corey the Moray Eel

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After stars run out of energy, they inflate by quite a bit and then shrink and become dwarf stars that expel a lot less energy but have a lot of mass, hence strengthening their gravitational pull. Eventually, they will fully run out of energy and become black dwarf stars, but the universe hasn't existed long enough for a star to become a black dwarf star. However, if the star is big enough, it becomes a supernova, which is the brightest thing in the universe. Supernovas also shrink by quite a bit and have an even stronger gravitational pull. If stars are big enough, they become neutron stars, which boast weights similar to the sun, although only the size of a big city. Eventually, neutron stars become black holes. If the star is very very big (like almost as big as the Clash Royale developers' bank accounts), it will not be able to support its weight and collapse in on itself, forming a black hole. Black holes are the heaviest thing in the universe; a black hole the size of a marble is as heavy as Earth and has a gravitational pull so strong that they suck in light, hence earning their name 'black hole', for being the darkest thing in the universe as they suck in light. Supermassive black holes are in the center of every galaxy, having lots of stars orbiting them, and some of the stars have planets orbiting them. Some scientists believe that there is a wormhole in the middle of every black hole, and want to send a kamikaze person to the center of our galaxy's black hole when we have the technology, which in my opinion is a tad bit stupid, but I'm not a scientist. :) NOT COPY AND PASTED I PROMISE.

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When two stars get too close to each other, they start to orbit each other because of their gravitational pull. This can happen with black holes too and in fact, there were multiple black hole collision centres whose whole purpose was detecting black holes and proving the existence of them. I forgot the name of the centres, unfortunately. However, when two black holes orbit each other and eventually collide, they send out energy waves and merge to form a larger supermassive black hole. Now back to the stars. When star A gets closer to us it turns blue and when it gets further it turns red. There can be triple-star systems too.

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stars are big

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The most popular theory of how the universe came to be is the big bang. The big bang theory (Not to be confused with the popular tv show) is that the universe was a tiny pinpoint of matter that exploded into the universe that we know and mostly love today. The hydrogen merged to become bigger and bigger elements eventually bringing us to the creation of Earth. There is a lot of evidence supporting this theory but I'm not so sure on the details. From what I can tell, there is a lot of hydrogen 'residue' from when the universe 'exploded'.

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One of the theories of how the moon formed is that a mars-ish sized planet or rock crashed into the Earth and the debris from the impact grouped and formed the moon.

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The sun is a star made of hydrogen and helium. It sends out energy into space and is over 10 million degrees.

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As you get nearer to one your perception of space and time changes. As you get nearer to the event horizon, you start to stretch like a piece of spaghetti. After going over the event horizon, anything could happen. We don't know. I support the theory that everything spurts out in a different universe from a white hole. The first black hole ever discovered was Cygnus-X1 (Not sure of the spelling) and it was just feeding off a neighboring star. As the star diminished, the black hole grew. I'm pretty sure this was called a binary. Black holes are formed when a supermassive star goes supernova and in the middle of all the gas, a black hole forms. It feeds off the gas and it forms an accretion disk. The accretion disk is a disk of gas and light swirling around the black hole, slowly getting sucked into the event horizon and beyond. (I probably got some details and spellings.)

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the universe is everything. It includes all space, and all matter and all energy that space contains. It even includes time itself. the universe has not stopped expanding since the big bang

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The second most suitable planet for us humans in our solar system is mars as it orbits the sun in the safe zone. Another thing is that the days there are a little longer than on earth. Unfortunately there is no water on Mars and there is no breathable air on Mars.

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Dark matter is a hypothetical type of matter  that makes up about 85% of the matter in the universe. Dark matter is called dark because it doesn't interact with many electromagnetic fealds

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rockets are vehicles that allow travel from one location in the cosmos to another, although the farthest humans have been is to the moon

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Planets formed by a bunch of asteroids and other small space debris crashed into each other sticking together to create some planets and some moons as well.

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Moons are similar to planets they orbit the object that is closest and has a gravitational pull strong enough to pull it towards itself.

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Black holes have a gravitational field that suck in space things like asteroids, comets and planets. Not even light can escape the gravitational pull of black holes.

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Artemis 1 launched last year and is the most powerful rocket to date, Artemis 2 will be the first spaceship to humans back to the moon since the 1972 apollo 17

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different planets in our solar system orbit the Earth at different speeds. Our solar system has 3 types of planets: gas giants, ice giants and terrestrial worlds that have their own features.

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Constellations are groups of stars that look like shapes, and were sometimes the basis of myths and helped in navigation. There were 48 traditional constellations.