Creation and the Jewish Bible
God creates the Sun and the Moon, in a medieval European painting God creates order from Chaos Many of the Jewish people in West Asia believed that at the beginning of time [...]
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08, 2017
Supernova – Space – Astronomy
Supernova from space (thanks to NASA and the Hubble Telescope) What is a supernova? Supernovas are exploding stars. Red giant stars explode when they have used up their hydrogen and helium fuel, and converted most of their atoms to iron [...]
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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
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
Space – Astronomy – Physics
Lyrid meteor shower - Space Most of the universe is just emptiness - there is nothing there at all. It's dark. That's space. But within the space there is a [...]
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08, 2017
What is a galaxy? – Astronomy – Space science
The galaxy M 100, seen through the Hubble telescope What is a galaxy? A galaxy is a group of millions of stars that are relatively near each other. Most stars seem to [...]
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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
Acceleration – Physics definitions
Pedaling will make her accelerate. So will going downhill. Acceleration is a way to measure how fast something is speeding up. Suppose you are riding your bike. You start out [...]
