Science - Chapter 30 Stars

12 terms by charennis

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nebula

cloud of interstellar gas and dust

protostar

formed when cloud contracts and forms a disc shape with a hot condensed object at the center

neutron star

formed by collapse of supernovae. Resistance to being squeezed creates pressure that halts collapse of the core, and the core becomes this.

supernova

formed when the entire outer portion of a star is blown off in a massive explosion

black hole

small but extremely dense object in which gravity is so intense nothing can escape it, not even light

Sun

largest object in the solar system in both size and mass. average density is similar to gas giants.

photosphere

sun's atmosphere

spectrum

visible light arranged by wavelengths

constellations

groups of stars

binary star

two stars that are gravitationally bound together and orbit a common center of mass

star's temperature, luminosity, and diameter

governed by mass

fusion

sun and stars on the main sequence produce energy by pushing hydrogen into helium

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