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Guardians of the Galaxy Vocab Crossword

Across
The apparent shift in the spectrum to the red end, due to the light emitting object in space moving away from the observer; Doppler shift
The distance between crests of waves, such as those of the electromagnetic spectrum
A group of stars forming a recognizable pattern, named after its apparent form or identified with a mythological figure
A fixed, glowing point in the night sky that is really a large, far-away light-source like our sun
the luminosity of a celestial body (such as a star) as observed from the earth
Includes planets, stars, galaxies, and all other contents of space
the quality of giving out or reflecting light:
the leading explanation about how the universe began
The scientific study of the large-scale properties of the universe
A unit of distance that it takes for light to travel in one year
Down
A unit of distance used to express the size of stars
The techniques used to measure the spectrum of electromagnetic radiation
a system of millions or billions of stars
A gravitationally bound system of stars, stellar remnants, intersteller gas and dust, and dark matter
The gravitationally curved path of an object around a point in space
The number of complete wavelengths that pass a point in a given time
Energy that is radiated or transmitted in the form of rays, waves, or particles
The colored band produced when a beam of light passes through a prism
A cloud of gas and dust in outer space
The study of objects and matter outside Earth's atmosphere