Sorting Stars
Brightness
Small Stars
Large Stars
Galaxies
100
Imaginary patterns of stars in the shape of people and animals
Constellations
100
How long is a light-year
The distance light can travel in one year.
100
What is the final stage for a small/medium massed star?
white dwarf
100
What is the first stage of a large-massed star?
Protostar
100
What is a galaxy?
a group of billions of stars
200
What are 3 ways to classify stars?
(1) Color/temperature (2) size (3) chemical composition
200
Stars are bright if they...
big, hot, and close to Earth
200
From what does a protostar form?
nebula
200
What are the two possible end stages of a large-massed star?
neutron star or black hole
200
What are the 3 types of galaxies?
spiral, elliptical, irregular
300
Is our star a small star, medium-sized star, or large star?
Medium
300
The brightness of a star as seen from Earth
Apparent brightness
300
For a small/medium massed star, what does a protostar turn into?
Red Giant
300
When a neutron stars spins and gives off light like a lighthouse, what is this called?
Pulsar
300
What is the name of our galaxy?
the Milky Way
400
What color are the coolest, medium, and hottest stars?
coolest are reddish; medium are yellow; hottest are blue
400
If two stars are the same size and the same temperature, how can one be brighter than the other?
If one is closer to Earth than the other.
400
How does a protostar form?
gravity pulls gas and dust together that then heat up and start nuclear fusion.
400
When SUPER massive stars die and the gravity is SO strong that not even light can escape, what is formed?
black hole
400
What is the universe?
All of space, including billions of galaxies
500
Generally speaking, what are stars made of?
73% hydrogen, 25% helium, 2% other gases
500
the brightness of a star if it was the same distance away from Earth as all the stars
Absolute brightness
500
The lifetime of a star depends on...
its mass
500
What is it called when a super giant explodes and parts are flung into space and possible recycled into new stars?
Supernova
500
What are 3 major differences between a spiral galaxy and an elliptical galaxy?
Shape: one has arms, the other is round What it is made of: spiral has lots of gas/dust, elliptical doesn't Types of stars: spiral has young and old, elliptical only has old.
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