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
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 helium? Atoms, elements, and chemistry
Diagram of a helium atom Helium is a very simple atom. Helium is a simple atom. The nucleus of a helium atom has two protons and two neutrons. Around the nucleus, [...]
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06, 2017
Helium balloon projects – Chemistry
You can see that helium is lighter than air by getting a helium balloon. When you let go of it, it goes up, because the helium is lighter than the nitrogen and [...]
