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4 1-4 Astronomy Drew Genui
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16
Astronomy
7th Grade
02/22/2013

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Cards

Term
constellations
Definition
paterns of stars in the night sky
Term
absolute magnitude
Definition
the measure of amount light a star gives off
Term
apparent magnitude
Definition
the measure of the amount of light received on Earth from a star
Term
light year
Definition
the distance light travels in one year
Term
photosphere
Definition
the layer of the Sun that gives of light
Term
chromosphere
Definition
a layer that extends upward 2000 km above the photospere
Term
corona
Definition
the largest layer of the Sun, extends millions of kilometers into space temperature can reach 2 million
Term
sunspot
Definition
areas on the Suns surface that are darker
Term
nebula
Definition
a cloud of gas and dust
Term
giant
Definition
a late stage in a stars life
Term
white dwarf
Definition
a stage where the star is only a hot white core.
Term
supergiant
Definition
a star that has expanded because of core temperstures
Term
nuetron star
Definition
a collapsed core that is very dense that have very strong gravity
Term
black hole
Definition
when a core copletely collapses and creates a place where no light can penatrate
Term
galaxy
Definition
a large group of stars, gas and dust that are held together by gravity
Term
Big Bang Theory
Definition
the leading theory about the formation of the universe
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