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Unit 4 Vocabulary

Across
Splitting two atoms
Apparent positional shift of an object caused by the motion of the observer
A hot, condensed object at the center of a nebula that will become a new star when nuclear fusion reactions begin
A collapsed, dense core of a star that forms quickly while its outer layers are falling inward
The distance equal to 3.26 light years and 3.086x1013 km
A group of stars that forms a pattern in the sky that resembles an animal, mythological character, or everyday object
How bright a star actually is
The region in an H-R diagram which runs from the upper left corner (hot, luminous stars) to the lower right corner (cold, dim stars)
Energy output from the surface of a star per second
A cloud of interstellar gas and dust that begins the formation of a star
An arc of gas that is ejected from the chromosphere, or is gas that condenses in the inner corona and rains back to the inner surface
Down
A wind of charged particles that flows out from the corona to the rest of the solar system
An explosion causing the outer layer of a star to blow off
A spinning neutron star that exhibits a pulsing pattern
How bright a star appears
Top layer of the sun's atmosphere that can only be seen during a solar eclipse with special equipment
Small, dense remnant of a star that’s gravity is so strong not even light can escape it
Lowest layer of the sun's atmosphere
Middle layer of the sun's atmosphere that can only be seen during a solar eclipse
When two stars are gravitationally bound together and orbit a common center of mass
Combining two atoms
Violent eruptions of particles and radiation from the surface of the sun
A dark spot on the surface of the photosphere