the force which causes things to stay or fall to the ground.
gravity
the angle of 23.5° that the Earth's axis sits on
tilt
a large, spherical celestial body that moves around a star
planet
a fragment of an asteroid that enters the Earth's atmosphere.
meteor
a giant ball of ice and dust
comet
the complete shadow caused by a celestial body during an eclipse
umbra
the spiral galaxy where we live
The Milky Way
a small rocky object that orbits the Sun
asteroid
a very large hole in the ground caused by something that has hit it
crater
a physical part of the Universe, consisting of solids, liquids and gases
matter
a group of stars that form patterns in the sky
constelllation
a group of billions of stars, planets, gas clouds and rock held together by gravity
galaxy
the light that reaches the Earth
brightness
a celestial body in the Solar System that is similar to a planet but is not big enough to be classified as one.
dwarf planet
the movement of a celestial body around another celestial body.
revolution
happens when one celestial body blocks the view of another. There are two types, lunar and solar
eclipse
an object that moves around a planet or a star
satellite
the line separating the side of the Earth in daytime and the side of the Earth in night time.
terminator
the smallest part of an element
atom
a natural object outside the Earth's atmosphere.
celestial body