a building for observing planets and stars

a group of stars that forms a pattern

The distance that light travels in one year

a large cloud of dust and gas that can break apart into smaller pieces and form stars

An enormous explosion of a giant star

a region of space resulting from the collapse of a star

A contracting cloud of gas and dust; the earliest stage of a star's life

a collection of star systems

all of space and everything in it

the initial explosion that resulted in the formation and expansion of the universe

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