Show:
Stars
Galaxies
More stars
More galaxies
100
Astronomers measure distances in a _______________
Light year
100
Where are stars born
Nebulas
100
A rapidly spinning neutron star that emits energy in pulses
Pulsar
100
A graph plotting each star's brightness against its temperature is a _______________________________
Hertzsprung-Russell diagram
200
The Milky Way is a ____________________________ galaxy
Spiral galaxy
200
Small stars (about the size of Earth), that are very dense hot stars made up mostly of carbon that are the remains after a red giant star has lost its outer layers
White dwarf
200

Two stars orbiting the same point is called what?

Binary Star

200
The most common type of star is a ______________________
Red dwarf
300
A relatively old star whose temperature has cooled and its diameter is about 100 times bigger than it was originally is a ______________________________
Red giant
300
A huge stellar explosion that is extremely bright but fades over several weeks or months
Supernova
300
A group of stars bound together by gravity is a ___________
Galaxy
300

Most galaxies have a __________________________ at the center.

Super massive black hole

400
The ________________________ is the galaxy group that includes the Milky Way.
Local group
400
About 90% of the stars, including the sun, are _______________________________ because they fuse hydrogen into helium as their fuel source
Main sequence stars
400
When supergiant stars die, they become ________________________________
Black holes
400
The largest know type of star, some almost as large as our entire solar system are _______________________
Supergiant stars
500
___________________________ are what remains after a red giant star loses it outer layers
white dwarfs
500
Really hot stars are __________________ in color and cooler stars are ______________________ in color.
Blue, red
500

How bright a star appears to be due to how close or far away it is ____________________________

Apparent brightness or magnitude