astronomy test - made by Yvette

Which stars live for the longest as main sequence stars: sun like stars or massive stars

sun like stars

what is the name of the point of infinite density and heat from which the universe first began

singularity

does the universe have a center

no

what scientist discovered what elements the sun was made out of

Cecillia Gaposchkin

did the universe used to be hot or cold

hot

how do we know that the universe used to be hot?

cosmic microwave background radiation

what scientist found proof that the universe is expanding?

Edwin Hubble

After the universe started with the Big bang what happend to the size of the universe?

expanded

After the universe started with the Big bang what happend to the tempeture of the universe?

decreased

are there other stars in our galaxy

yes

are there other solar systems in our galaxy

yes

is our galaxy the only thing in space

no, our galaxy other known as the milkyway is not the only thing in space.

3 part defintion of a planet

1. is spherical

2. clears the neighborhood around its orbit

3. orbits the sun

other name for terrestrial planets

rocky planets

other name for jovian planets

gas giants

members of terrestrial

earth

mars

mercury

venus

members of jovian

jupiter

saturn

uranus

neptune

size of terrestrial planets

smaller

size of jovian planets

bigger

distance from sun terrestrial

closer

distance from the sun jovain

farther

what is terrestrial made of

rocky metal

what is jovian made of

hydrogen helium

density of terrestrial

higher

density of jovian

less

galatic adress

earth, solar system, orion arm, milky way, localgroup, virgo supercluster, lanlaked supercluster, universe

what will the sun become in 4.5 billion years from now

a white dwarf

what is the name of the boundry around the black hole

event horizon

how old is the solar system

4.6 billion years

what is 3-5 times more massive then the sun

neutron star

what is 4-20 times the size of the sun

black hole