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Astronomy

TermDefinition
Solar system The Sun and all other objects in orbit around it.
Planets Round objects in space that are satellites of the Sun.
Telescope Instruments that allow us to see far away things appear close.
Comet Made up of mostly ice with rocks and dust. This moves in a long narrow orbit.
Asteroids Large chunk of rock or metal in space. A belt of these separate the inner and outer planets.
Meteor A piece of asteroid that has broken off and has entered the Earth’s atmosphere. Small forms of this burn up in Earth’s Atmosphere and do not reach Earth’s Surface.
Inner planets Mercury, Venus, Earth, Mars. These planets are small and rocky. Warmer and closer to the sun. These are more like Earth.
Outer planets Jupiter, Saturn, Uranus, Neptune. These planets are large and are made up of a lot of gas. There surface is mainly made of hydrogen and helium. They all have a ring system, even though they may be hard to see.
Rotation The act of spinning. The Earth has one of these each day.
Axis Real or imaginary line that an object spins around.
Revolution When one object travels around another. The Earth does one of these every 365 ¼ days.
Tides The daily rise and fall of the ocean’s surface.
Created by: vkoegler