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18 Cards in this Set

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  • Back
The most important star to the earth.
sun
How does the sun benefit the earth?
provides light, heat and energy that we need to survive.
How far away is the sun from the earth?
93 million miles
What is the hottest region of the son?
the core
The sun's visible surface is called the
photosphere
What are the dark patches on the sun's surface caused by the sun's magnetic field?
sunspots
loops of cool gas erupting far from the chromosphere
solar prominences
How are the solar prominences suspended in space?
by the sun's magnetic field
Tremendous bursts of energy caused by sudden changes in the sun's magnetic field
solar flares
the hottest region of the sun's atmosphere; it extends hundreds of thousands of miles from the sun's surface . . .
colossal corona
A faint wind of high speed gas particles that stream into space from the sun's corona
solar wind
What unit is used to measure great distances
light year
a group of two stars that circle around each other
binary star
the violent explosion of a star
super nova
absolute magnitude
the actual brightness of a star; depends on the amount of light it produces no it's distance
apparent magnitude
the apparent brightness of a star that depends on:
1. actual brightness
2. distance from earth
magnitude
the lower the number the brighter the star
occurs when a star flares up many times than it's normal brightness
nova