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13 terms

7th grade astronomy ch 2 sections 1 and 2

STUDY
PLAY
spectrum
colored band produced when a beam of light passes through a prism
apparent magnitude
the brightness of a star when viewed from Earth
absolute magnitude
The actual brightness of a star
light year
the distance light travels in one year
parallax
the apparent change in position of an object when seen from different places
red giant
A large, reddish star late in its life cycle
white dwarf
a small, hot star near the end of its life; the leftover center of an old star
H-R diagram
classifies stars by temperature and absolute brightness
main sequence
the location on the H-R diagram where most stars lie
supernova
An enormous explosion of a giant star
neutron star
a star that has collapsed under its own gravity
pulsar
a rapidly spinning neutron star that produces radio waves
black hole
an object whose gravity is so strong that nothing, not even light, can escape

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