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Astronomy

Stars, etc

QuestionAnswer
HR diagram Used to plot a star's temperature & brightness. Red stars are very cool and blue stars are very hot.
nebula A ball of gas & dust where stars are created
black hole theoretical ending to a major mass star
spiral galaxy a type of galaxy with a bulging disk in the middle and arms radiating off it.
irregular galaxy a type of galaxy that has no definite shape
elliptical galaxy a type of galaxy with no arms and a elliptical/egg shape center
main sequence where most stars in the universe would be plotted in a HR diagram
red giant a star in the end of its life that has cooled and brightened
supernova a major mass star that explodes resulting into a black hole or a pulsar
white dwarf the remains of an average star that has died
black dwarf remains of a white dwarf that has used all of its energy
light year the distance that light can travel in a year in space, used to measure distance between space objects
Big Bang Theory The predominant theory of how the universe was created 14 billion years ago when a small, dense mass exploded hurling matter across the universe.
Milky Way Galaxy A spiral galaxy that Earth is in.
medium/media The material that transports most types waves
Electromagnetic Spectrum A type of waves that do not need a medium to travel-examples are infrared, X-ray, UV, gamma, radio, microwave, visible light.
Can you hear sound in space? Why or why not? You can't hear sounds in space because their is not a medium for the sound waves to travel on.
How do stars shine? Through nuclear fusion. They burn their fuel like a nuclear power plant does.
Created by: chanteb
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