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
The Moon – Astronomy – Physics
Earth's moon (about 239,000 miles from Earth) (That's almost ten times as far as going all the way around the Earth) Where did the moon come from? Nobody knows exactly [...]
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08, 2017
Meteors – Shooting stars – Astronomy
Lyrid meteor shower What is a meteor? Meteors or meteorites are bits of rock (like granite) and ice - usually a mixture of rock and iron and nickel but sometimes just rock or [...]
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08, 2017
Mercury – Planets – Astronomy
Mercury from space Which planet is Mercury? Mercury is the closest planet to our Sun. At some parts of its orbit, Mercury is only about 46 million kilometers away from the sun. The [...]
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08, 2017
What is mass? Physics
This truck has a lot of mass. Mass is a measure of the number of atoms in an object combined with the density of those atoms. Usually people measure mass in kilograms. You can tell [...]
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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
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 gravity? Physics
What is gravity? The Moon orbiting Earth (taken from space) - NASA What does gravity do? Gravity attracts all objects towards each other. Gravity has been around since the very [...]
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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 [...]
