Chapter 19 Flashcards
The band of colors produced when white light passes through a prism
spectrum
the brightness of a star as seen from the earth
apparent magnitude
the brightness that a star would have at a distance of 32.6 light years from earth
absolute magnintude
an apparent shift in the position of an object when viewed from different locations
parallax
a large reddish star late in it’s life cycle
red giant
a small hot dim star that is the left over center of an old star
white dwarf
the location on the h-r diagram where most stars lie. it has a diagonal pattern from the lower right to the upper left.
main sequence
a graph that shows the relationship between a star’s surface temperature and absolute magnitude.
HR Diagram (Hertzsprung Russell diagram)
a gigantic explosion in which a massive star collapses and throws it’s outer layers into space
supernova
a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons.
neutron star
a rapidly spinning neutron star that emits rapid pulses of radio and optical energy.
pulsar
an object so massive and dense that even light cannot escape its energy
black hole
the study of the origin, properties, processes and evolution of the universe
cosmology
a tight group of stars that look like a ball and contains up to 1 million stars
globular cluster
large groups of stars, dust and gas are called galaxies
galaxies
