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Flashcards / Science / science 9 origins of the universe

science 9 origins of the universe

science 9 origins of the universe

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School: University of the Pacific
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Tags: University of the Pacific
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Name: science 9 origins of the universe
Uploaded: 04/10/2016
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Astronomers

scientists who study the stars and other objects in the sky

Big Bang theory

states that about 13.7 billion years ago, the universe began with a huge, fiery explosion.

Celestial Bodies

all objects seen in the sky (the Sun, Moon, stars, and planets)

Cosmological red shift

the displacement of spectral lines to redder colors caused by the expansion of the universe

Electromagnetic radiation

radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge

Elliptical galaxy

A galaxy shaped like a round or flattened ball, generally containing only old stars.

Irregular galaxy

a galaxy that does not have a regular shape

Nebula

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

Red shift

a shift in the spectra of distant galaxies toward longer wavelengths

Spectroscope

an insrument with a prism used to find out the elements of a star

spiral galaxy

a galaxy having a spiral structure

Star cluster

a group of hundreds or thousands traveling together in space