What’s the atmosphere? Weather science
Earth's atmosphere: Did the Earth look like this right after it cooled down? What is the atmosphere? The atmosphere is the air that is wrapped all around a planet. Read more [...]
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08, 2017
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08, 2017
What are stars made of? Astronomy, physics
What are stars made of? This is just one of the stars: the sun from space The first stars The earliest stars probably formed only a few hundred thousand years [...]
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08, 2017
Neptune – Planets – Astronomy – Physics
Neptune from space Neptune is the farthest planet from our Sun. Neptune is the only planet that is so far away that you can't see it without a telescope. Neptune (NEPP-toon) is [...]
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08, 2017
What is a nebula? Space and astronomy
The Eagle Nebula A nebula is a bunch of atoms and molecules floating in outer space, like a cloud of dust. More than one nebula are called nebulae, because -ae is the plural ending [...]
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08, 2017
Main sequence stars – Astronomy
Main sequence stars: A starry sky with the Milky Way galaxy (thanks to Bernd Nies) What is a main sequence star? Nine out of ten stars that you see in the sky [...]
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08, 2017
Jupiter – Planets – Astronomy
Jupiter from space Jupiter (named after the Roman god Jupiter) is the next planet further out from our Sun after Mars. But Jupiter is much, much further away from the Sun than Mars is. If [...]
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08, 2017
Big bang – Space science – Physics
Inside stars (like our Sun) there are fusion reactions. Stars got started after the Big Bang. What was the Big Bang? The Big Bang was the very beginning of our [...]
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08, 2017
Nuclear physics – fission and fusion
Atomic bomb explosions make a "mushroom cloud" - this is a fission reaction Nuclear physics is the process of getting energy from the nucleus of an atom. There are two ways to release [...]
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08, 2017
Nuclear fusion – Simple Physics
The Sun shining from space: nuclear fusion in action. The first fusion reactions Fusion reactions are how the first stars got started. Soon after the Big Bang, hydrogen atoms began bumping into each other and [...]
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06, 2017
What is water made of? Molecules and chemistry
A big ocean wave The first molecules of water formed out in space, about 14 billion years ago, as part of the nebula left over after an early star exploded [...]