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Stars, Galaxies, and the Universe

Across
An observed change in the frequency of a wave when the source or observer is moving.
An apparent shift in the position of an object when viewed from two different locations.
A star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons.
One of 88 regions into which the sky has been divided in order to describe the locations of celestial objects.
The ears from brightness that a star would have at a distance of 32.6 light-years from Earth.
The study of the origin, properties, processes, and the evolution of the universe.
The place in a star where nuclear fusion begins
A large cloud of gas and dust in interstellar space; a region where stars are born.
The distance that light travels in one year; about 9.46 trillion kilometers.
Down
A large celestial body that is composed of gas that emits light; the sun is a typical one of these
The element whose nuclei fuse together to form
The brightness of a star as seen from the Earth
A small, hot, dim star that is the leftover center of an old star.
The process by which nuclei of small atoms combine to form new, more massive nuclei; the process releases.
The scientific study of the universe.
The location on the H-R diagram where most stars lie
A collection of stars, dust, and gas bound together by gravity.