(astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
All of space and everything in it.
an extremely large star that creates elemants as heavy as iron
a star that has collapsed under its own gravity
a rapidly spinning neutron star that produces radio waves
a large mass of collapsing gas and dust located in the universe that forms stars and planets
a galaxy shaped like a round or flattened ball, generally containing only old stars
A galaxy that looks similar to a spiral galaxy but has a bar in the center
a diagram that classifies stars according to temperature and brightness
the brightness of a star when viewed from Earth
Main Sequence Star
A normal star that is undergoing nuclear fusion of hydrogen into helium. Our sun is a typical main sequence star.
a very bright star of large diameter and low density (relative to the Sun)
A relatively small, low-mass star that emits an average or below-average amount of light.
a region of space resulting from the collapse of a star
large isolated system of stars, such as the Milky Way; collection of brilliant personalities
a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star
A galaxy that does not have a regular shape.
The brightness of a star
A measure of the amount of light that a star actually emits.
a starlike object that may send out radio waves and other forms of energy