Life Cycle of a Star
How can a supernova end?
Neutron star or black hole
What happened in the Big Bang?
The material from initial singularity expanded in all directions
Where are black holes located in a galaxy?
At the center
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Black hole
What stage of the life cycle is the sun in?
Main sequence phase
Is the Big Crunch likely to occur? Why or why not?
Dark energy determines the end of the universe, not the amount of stuff
What type of charge does an electron have?
Negative
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Supernova
What is a white dwarf?
Dense remains of a star
Why is dark energy called “dark energy”?
Normal matter and energy cannot do what it does
What were the first stars made of?
Helium and hydrogen
Why does time slow down near a black hole?
According to Einstein’s General Theory of Relativity, space-time slows down near any massive object
What is initial singularity?
A hot and compact point that contained everything
How did the solar system form?
A cloud of gas formed into the sun with rings, which formed into planets, moons, asteroids, etc.
What percentage of stars in the universe are in the main sequence phase?
90%
Why would the Big Freeze occur?
No heat can be used because it is evenly distributed
What are the small, early galaxies called?
Protogalaxies