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Vocab #1
Vocab #2
Section 1
Section 2
Section 3
100
What are the stars in the giant branch of the Hertzsprung-Russell diagram called?
What is Variable Stars
100
What are giant galaxies that are 100s of millions of light-years in size?
What is Superclusters
100
What is the hazy band of light across the sky known as?
What is The Milky Way
100
What are dislike galaxies with spiral arms called?
What is Spiral Galaxies
100
The fact that the universe is expanding states that it had?
What is A Beginning
200
What is a spherical region where globular clusters are located?
What is Halo
200
Which variables have pulsation periods between 1.5 hours and 1 day?
What is RR Lyrae Variables
200
How much of the galaxy's mass is contained in the halo?
What is 90%
200
What are the names of galaxies that are irregular and are close to the Milky Way?
What is Large and Small Magellanic Clouds
200
True/False The steady-state universe doesn’t change with time
What is True
300
What are starlike objects with emission lines in their spectra?
What is Quasars
300
Which variables have pulsation periods between 1 and 100 days?
What is Cepheid Variables
300
What do astronomers use to determine the distance to a globular cluster?
What is RR Lyrae Variables
300
What is the name of the small cluster of galaxies that the Milky Way belongs to?
What is Local Group
300
What is the critical density?
What is The dividing point b/w a closed or open universe
400
What is the study of the universe, its current nature, and its origin and revolution?
What is Cosmology
400
What are the cores of galaxies where highly energetic objects/activities are located?
What is Active Galactic Nuclei/AGNs
400
What star is believed to be a black hole?
What is Sagittarius*
400
What is the equation for Hubble's Law?
What is v=Hd
400
What happens if the density equals the critical density?
What is The universe is flat
500
What is used to calculate the rate that the universe is expanding?
What is Hubble Constant
500
What theory proposes that the universe began as a single point & has been expanding ever since?
What is Big Bang Theory
500
How have astronomers been able to determine the shape of the galaxy?
What is By Using Radio Waves
500
What 2 things emit more energy than ordinary galaxies
What is AGNs & Quasars
500
True/False The universe's rate of expansion is speeding up
What is True