When someone is catapulted, they are suddenly thrown into a new or different situation. This can be a happy or a sad situation, but it always comes as a surprise.
A centimeter is a unit of length that is equal to one hundredth of a meter. It's usually abbreviated with the abbreviation "cm."
A microsecond is a very small amount of time, usually measured in thousandths of a second. It's usually not big enough to notice, but it can make a big difference in the way that something works.
When something is indistinguishable, it's impossible to tell which one is which. This can be a problem when you're trying to identify someone.
A gluon is a particle that is responsible for the strong force. The strong force is a force that is responsible for holding together atoms and molecules.
A pulsar is a type of star that is very strange. It's called a pulsar because its star is always rotating, and the rotation is so fast that it creates pulses of light.
Spaceships are vehicles that are used to travel through space. They are usually made out of metal and plastic, and they are powered by engines.