unit 20: components of the universe Flashcards
the brightness of a star as it would be seen from 32.6 light years away
absolute magnitude
a space object so dense and massive that even light cannot escape its gravitational pull
Black hole
The sorting of objects into groups that are alike in some way
Classification
A part of a larger whole
component
To tell in written or spoken words
describe
The most common type of galaxy that has an oval shape
elliptical galaxy
A grouping of stars gas and dust held together by gravity
Galaxy
A graph in which the absolute magnitude of stars is plotted vertically against their surface temperatures
hertzsprung-russell diagram
A galaxy that does not have a regular shape
irregular galaxy
A point in the lifecycle of a star when it uses hydrogen as it’s fuel source
main sequence star
A star with a high mass that uses helium as it’s fuel source
massive star
A copy or replica of an object
model
A large cloud of gas and dust in space
nebula
A very dense compact star composed primarily of neutrons formed from the collapsed core of a supernova
neutron star
A ring-shaped nebula formed by expanding gas around and aging star
Planetary nebula
A luminous giant star with moderate mass in the late days of stellular evolution
red giant
And extremely large star largest in volume with radii 200 to 800 times greater than the sun
Red super giant
A tool used to examine and observe light
spectroscope
A galaxy that forms a pinwheel shape
spiral galaxy
A huge ball of gas in space that releases heat and light
Star
An explosion of a star that occurs during the final stage in the lifecycle of some stars
supernova
All matter and energy as a whole including earth the galaxies and space
Universe
The extremely dense hot bright remnants of a collapsed star
White dwarf
