Galaxies
What is a galaxy?
A huge reservatory of of dust, stars, and gas
A huge ball of ionized plasma (or a huge ball of hot gas)
A star or the sun
What happenes when black holes collide?
They merge to create a slightly bigger black hole.
What is our solar system?
What is gravity?
The force which pulls an object towards a huge object of mass.
What’s in the center of galaxies?
A super massive black hole
How forms can a star take?
About 6
What is a black hole?
An interstellar object whose gravity is so strong light can’t escape it.
Is there an Oort cloud?
It’s just a theory but astronomers think there’s an Oort could
What are planets made out of?
Dust, some form of metal dust, and tiny grains
How many types of galaxies are there?
3
A star relieves truly on its mass to survive. True of false
True
How much of the universe have we explored from earth?
Only about 4%
Galaxies are a type of system. True or False?
True
How does the sun power itself?
It powers itself by burning hydrogen and helium through nuclear reactions.
How long are galaxies usually?
1,000 to 100,000 parsecs
What keeps the sun spinning?
On its own inertia.
What is dark matter?
A matter which holds everything together
Triple AGN system
A system usually meaning 3 black holes orbiting each other.
Does every black hole contain a singularity?
It’s just a theory, but there is no explanation on how a black hole contains its gravity so yes.
What are usually in galaxies?
Black holes, neutron Stars, Stars, and planets.
How often does the sun’s magnetic flip?
About every 11 years.
How big is the universe?
Nobody knows
What is a binary star system?
2 stars orbiting each other
What is the strongest force in the universe?
Strong nuclear force (not gravity surprisingly)