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Space Term Glossary

Asteroid (also called planetoid) - A medium-sized rocky object that orbits the Sun. It's smaller than a planet but larger than a meteoroid. Also, any number of small bodies that revolve around the Sun.


Atmosphere - The air all around Earth.

Black Hole - An object with gravity strong enough to suck anything into it, even light.

Celestial Bodies - Natural objects visible in the sky - planets, stars, meteoroids, etc.

Comet - A giant snowball of ice and dust that revolves around the Sun. When it gets near the Sun, ice melts and looks like a tail. Haley's comet is probably the most famous comet.

Constellation - A group of stars that make a shape (they look like connect-the-dots) - usually named after mythological characters, people, animals and things.

Eclipse - This is when one celestial body cuts off the light of another - like when the moon covers the Sun for a brief moment.

Galaxy - A large group of stars. Our galaxy (called the Milky Way) includes the Sun.

Gravity - The natural force of attraction that pulls objects together - this is also what keeps our feet on the ground.

Great Red Spot - A huge colorful swirl of gases that spin counterclockwise on Jupiter.

Light Year - The distance light travels in a vacuum in one year (about 9.5 trillion km/6 trillion miles.)

Meteor (also a shooting star or a falling star) - A bright streak of light in the sky caused by a meteoroid or a small icy particle as it burns up entering Earth's atmosphere. Very large, bright ones are called fireballs and bolides.

Meteorite - A part of a meteoroid found on Earth.

Meteoroid - A small rock in space.

Orbit - The path that an object moves around a second object or point. For example, Earth orbits the Sun.

Planet - An object bigger than an asteroid orbiting a star. Our solar system has nine planets.

Satellite - A body that revolves around a larger body. The moon is a satellite of Earth. High-tech manmade satellites orbit Earth and the Sun, transmitting pictures, TV channels and phone signals.

Shooting Star - See meteor.

Solar System - The Sun, the nine planets and any other celestial bodies that orbit the Sun.

Solar Wind - A thin flow of energetic and gas charged particles that stream from the Sun. These blow throughout the solar system at speeds of hundreds of kilometers per second.

Speed of Light - 299,792,458 meters/second (186,000 miles/second.) Einstein's Theory of Relativity says that nothing can go faster than the speed of light. Of course, the crew on the Starship Enterprise knows better.

Star - Any celestial body that is visible at night (because it's brightly lit) from Earth at night.

Universe - All the matter and energy out there - this includes the Earth, galaxies, solar systems, you, your favorite pop star and everything else.

White Dwarf - The 'remains' of a star after it has collapsed. It is white looking (because it's so hot) and is extremely dense.

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Random In The Forums

KingShawn13
KingShawn13 posted in Debating:
I think it should be lowered to eighteen. It's only fair because if you're able to join the military and risk your life at the age of eighteen then you should be able to drink a #### here and there. Unless they push the recruitment age up to twenty-one then I'll agree that is what the drinking age should be. 
reply 15 minutes
Honour
Honour posted in Debating:
I think the drinking age should be 70!  There are way too many hooligans running around these days!
reply 35 minutes
Jaxon2ooo
Jaxon2ooo posted in Electronics:
search "do a barrel roll" in google
reply about 2 hours
CaptJolee
CaptJolee posted in Debating:
heck no!, people are more stupid when they are young so it's best not to let them drink when they are young
reply about 2 hours
BerNerNerZ
BerNerNerZ posted in Debating:
For those of you who didn't know the drinking is actually twenty-one . In my opinion the drinking age should not be lowered .  For one , if even young adults do rash things while drinking like doing what I call 'getting jiggy' . Let's not talk about it . Now it might not be their choice to do those things because people get very loopy and unpredictable after drinking .    In my opion drinking shouldn't even be allowed ! It's not like it would help banning it though . Some things are illegal for a reason yet some people feel the need to break the law .  I'm sorry about my ranting . XD What do you think  ? Should the drinking age be lowered ? Or no ?  :)
reply about 3 hours