Stars
The Sun
Life Cycle Of Stars
Groups Of Stars
The Expanding Universe
100
Small, dense remains of a low or medium mass star
What is a white dwarf?
100
Consists of the core, the radiation zone, and the convection zone
What is the sun's interior?
100
An object whose surface gravity is so great that even electromagnetic waves cannot escape from it
What is a black hole?
100
Open clusters, associations, and globular clusters
What are the kinds of star clusters?
100
Light that is shifted toward red wavelengths
What is the red shift?
200
How bright a star really is
What is absolute brightness?
200
A region of highly compressed gas in the sun
What is the radiation zone?
200
A contracting cloud of gas and dust with enough mass to form a star
What is a protostar?
200
A group of two or more stars that are held together by gravity
What is a star system?
200
It is 13.7 billion years old
What is the age of the universe?
300
The apparent change in position of an object with respect to a distant background
What is parallax?
300
The outermost layer of the sun's atmosphere
What is the corona?
300
A glowing cloud of dust that surrounds dying stars
What is a planetary nebula?
300
A large group of older stars
What is a globular cluster?
300
Says the speed at which a galaxy is moving is proportional to it's distance from us
What is Hubble's Law?
400
The brightness of a star as it appears from Earth
What is apparent brightness?
400
The sun gives off energy in this type of radiation
What is electromagnetic radiation?
400
Forms from the collapse of a star's outer layers
What is a super nova?
400
Spiral, barred-spiral, elliptical, and irregular
What are the types of galaxies?
400
States that the universe began in an instant in an enormous explosion
What is the Big Bang theory?
500
A graph of the surface temperature, or color, and absolute brightness of a sample of stars
What is an H-R diagram?
500
Huge loops of gas that erupt from sunspot regions
What are prominences?
500
A spinning neutron star that appears to give off strong pulses of radio waves
What is a pulsar?
500
Enormously bright centers of distant, young galaxies
What are quasars?
500
Matter that does not give off radiation
What is dark matter?
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