Galaxies
Stellar Evolution
Stars, General
Universe Stuff
Leftovers
100
What do you call a large group of stars, dust and gas?
A galaxy
100
Where are stars born?
Nebulas
100
What force caused proto-stars to form in a nebula?
Gravity
100
How old is the Universe?
About 14 billion years.
100
Stephen ________ is a famous physicist.
Hawking
200
What are the 3 types of normal galaxies?
Spiral, elliptical, and irregular
200
What must a proto-star do in order to become an “official” star?
Nuclear fusion
200
How much longer will our sun “exist” in its present state?
about 5 billion years
200
What evidence supports the Big Bang Theory?
Red Shift of almost all galaxies
200
What is the closest spiral galaxy to the Milky Way?
Andromeda
300
What are the 3 active galaxies?
Seyfert, radio, and quasars
300
What phase is a star in when it fuses helium into carbon?
Red Giant
300
Which stars are hotter: Red Giants or White Dwarfs?
White Dwarfs
300
What is a singularity?
The point from which the Universe exploded in the Big Bang.
300
What is the Y axis and X axis on the H-R Diagram
Y axis is Luminosity or Brightness X axis is Temperature
400
What are the Milky Way’s dimensions?
100,000 light years, by 1,000 light years
400
How many black dwarfs are in the universe?
None (Currently)
400
Do stars with lower mass or higher mass live longer?
Lower Mass
400
Name three units used to measure distance in space.
Light years, astronomical units, and parsecs
400
How many spiral arms does the Milky Way have?
3
500
What is the evidence of a black hole at the center of our galaxy?
Stars are moving faster around the galaxy’s center, and radiation is emitted from the center
500
What force from inside a star tries to counteract gravity?
Thermal pressure from nuclear fusion
500
Who created the H-R Diagram?
Hertzsprung and Russell
500
How many km or miles does light travel in a year?
10 trillion km, 6 trillion mi
500
Where do the heavy elements on the periodic table come from?
Supernovas
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