A ___ is a large group of stars held together by gravity.

A cloud of dust, gases, and debris is called a ___.

The measurement of a star's apparent movement over time is known as ____.

A neutron star that spins rapidly on its axis is called a ____.

When an existing star flares up and becomes brighter than normal, it is called a ___.

Smaller stars, like our sun, are ____.

contains two stars

a chunk of frozen gases, water, and dust that orbits the sun

made of irregularly shaped pieces of rock, metal, and dust

two or three stars held together by gravity

a huge star system that covers many light-years of space

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