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Planet
a large body that orbits a star
Light year
a unit of length used to measure astronomical distances
Neutron star
the collapsed core of a massive star that has exploded in a supernova.
Star
giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements
Nebula
a small cloud
Super nova
a massive explosion that occurs when a star dies
White dwarf
stellar core remnant that's left behind after a star has exhausted its nuclear fuel and shed its outer layers
Solar system
the entirety of space, time, and everything in them, including all matter and energy, and the structures they form
Galaxy
a massive collection of stars, planets, gas, dust, and dark matter held together by gravity
Universe
the entirety of space, time, and everything in them, including all matter and energy, and the structures they form