Star test, star clusters, types of stars
Terms in this set (24)
Distance light travels in one year.
Chart of absolute brightness (or luminosity) and surface temperature
Main Sequence star
A normal star that is undergoing nuclear fusion of hydrogen into helium.
A large cloud of dust and gas in space
a disk of gas with a center that is concentrated with matter. As it contracts the gravitational energy is converted to heat and fusion is about to begin.
a very hot star surrounded by an expanding envelope of ionized gases. This stage happens after the red giant stage.
• The core of a lower mass star that is left after the red giant's gasses have drifted off.
• a dark mass from a lower mass star. It emits no light.
• It will then spend the rest of eternity drifting silently through space.
The collapse of a red supergiant's core after fusing iron, energy is released in the form of an outward explosion.
• Super dense core of massive star made of neutrons.
• After the supernova of the largest mass stars contract under great gravity crushing the core of the star.
• There is so much mass its gravity prevents even light from leaving it
a collection of star systems.
How bright a star appears to be when you see if from Earth.
How bright the star is if all stars were the same distance from Earth.
3 types of galaxies
spiral, elliptical, and irregular
is the change in wavelength and frequency of a wave for an observer moving relative to its source.
big bang theory
the most widely accepted scientific theory that the universe began as a small particle of energy, exploded, and created matter and space.
the total amount of energy emitted by the star.
the study of celestial objects, space, and the physical universe as a whole.
the study of the movements and relative positions of celestial bodies interpreted as having an influence on human affairs and the natural world.
a rapidly spinning neutron star that emits pulses of radio and optical energy.
the rotation of the Earth
the reason stars appear to move in circular path around the North Star
the Earth's revolution
the reason that we only see certain stars in certain seasons
a star that always remains above the horizon for a particular latitude.