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 [...]
19
08, 2017
19
08, 2017
Saturn – Planets – Astronomy
Saturn, as seen from space After Jupiter, Saturn is the next farthest planet out from our Sun. In some ways, Saturn is a lot like Jupiter - it's very cold, and it's mostly made [...]
19
08, 2017
What are planets? Astronomy – Space science
What are planets? The planet Venus from space Before there were planets For several hundred million years after the Big Bang, there were no planets, only stars. Planets couldn't form until the [...]
19
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 [...]
19
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 [...]
19
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 [...]
19
08, 2017
Momentum – Physics
This truck has a lot of mass, and it's going fast, so it has a lot of momentum Momentum describes how strong a moving thing is. Things that aren't moving [...]
18
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 [...]
18
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 [...]
18
08, 2017
Mars, the red planet – Astronomy
Mars, the way the planet looks from space Which planet is Mars? The closest planet to Earth is Mars, and Mars is also the planet that seems most likely to have life on [...]
