Stars and galaxies

20 terms by tystimpy33 

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Supergiant

relatively cool star that has expanded to more than 700 times as large as our sun

CONSTELLATIONS

groups of stars whose positions in the sky seem to change as earth moves

photosphere

lowest layer of the sun's atmosphere that gives off light

Main Sequence

classification of about 90% of the stars

absolute magnitude

actual amount of light a star gives off

Binary System

two or more stars revolving around one another

Supernova

produced from an explosion that occurs when a star's core collapses

neutron star

a star in which only neutrons can exist in its core

black hole

an object so dense that nothing, including light, can escape it.

Galaxy

a large group of stars gas and dust held together by gravity

Giant

large cool expanding star in which hellium fuses to form carbon

Apparent magnitude

amount of a stars light observed on earth

Parallax

apparent shift in position of a object when viewed from different places used to determine distances

Light Year

distance that light travels in one year

Sunspots

Dark cooler areas of the sun's surface

Chromosphere

layer of the sun atmosphere above the photosphere

Corona

outer layer and largest part of the sun's atmophere

White Dwarf

small hot star consisting of a hot dense core contracting under the force of gravity

nebula

Earlier stage of a stars formation

Big Bang Theory

Explanation for the beginning of the universe

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