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Star Birth
Star Death
Supergiants
Giants
Fun Facts
100
Which is more dense, a nebula or a star?
A star is more dense than a nebula.
100
What happens when a star runs out of fuel?
The star dies and either becomes a supernova if it is a supergiant star, or a planetary nebula if it is a giant star.
100
Name two examples of what can happen after a supernova.
1-Black Hole 2-Neutron star
100
About how big are white and black dwarfs?
They are both about the same size, and they both are about the size of Earth.
100

What are stars made out of?

Stars are made out of gas and dust. (Mostly hydrogen gas.)

200

A place where hydrogen gas and dust collects in space which could eventually produce a star.

What is a nebula?

200

Why do we call something a black hole?

Not even light can escape the gravity of a black hole.

200
What causes a supernova?
A supernova is caused when a supergiant star runs out of fuel and explodes.
200
What is a planetary nebula?
A ring-shaped nebula formed by an expanding shell of gas around a old star.
200
Do black holes have gravity?
Yes, they have immense amounts of gravity.
300

This is made when hydrogen atoms are fused.

What is helium?

300

What does a star's mass have to do with its lifespan?

A star with less mass lives longer than a star with more mass.

300
What is a black hole?
A dead super giant that has a huge amount of gravity and eats anything in its path.
300
What is a white dwarf?
A dead Red giant that lost its fuel but still looks illuminated to our point of view.
300
Which is bigger, a neutron star, or a white dwarf?
A white dwarf is bigger than a neutron star.
400
What is a star called when it is just starting to form, but it hasn't gone through nuclear fusion yet?
It is called a protostar.
400
What happens to a supergiant star after it dies?
It explodes into a supernova.
400
What is a neutron star?
A neutron star is the extremely dense star that remains after a super giant's death. It also spins extremely fast.
400
What is a black dwarf?
A fully dead Red giant.
400
What is nuclear fusion?
Nuclear fusion is the process by which atoms combine to form heavier atoms.
500

DAILY DOUBLE How does a star form?

A star forms when something interrupts a nebula and causes it to become dense in one spot, and gravity intensifies in that spot causing it to become larger and denser even quicker. Then, nuclear fusion starts.

500
What are the radio signals that a neutron star emits?
The radio signals are called pulsars.
500
About how long does a supergiant star’s life last?
About 10 million years.
500
About how long does a giant star’s life last?
About 10 billion years.
500
Does a white dwarf run on fuel?
No, a white dwarf does not run on fuel.