astronomers
who were the first to record the movements of the stars and planets
the ancient Chinese, Babylonians, and the Egyptians
the arms of this galaxy type are filled with stars and gas clouds
spiral type
walt Disney named this character after this planet just a few months after it was found and named
pluto
this is the first part of a stars life cycle
nebula
how long is a year on pluto
90520 days
who was the sixteenth-century astronomer
tycho brahe
the center of this galaxy type is a bar of stars
barred spiral type
this planet is the smallest out of the gas planets
neptune
how long does a massive star live
seven hundred million years
how long is a year on mars
693.5 days
this astronomers ideas were published in 1543
nicolaus copernicus
this galaxy type is massive, with 5 trillion stars
a large body crashed into this planet
uranus
how long do small stars live for
many billions of years
how long is a day on venus
5832 hours
who proved the earth was round
the Greeks
this galaxy type has random shapes and is way smaller then the milky way
irregular galaxy
this planet has the most moons
saturn
when all that remains is a small hot faint star, its called what?
a white dwarf
how long is a day on Jupiter
9.8 hours
ptolemy believed that the earth was at the center of the universe, for how many years did people believe this
1,500 years
this is the nearest galaxy to the milky way
the spiral Andromeda galaxy
this planet has the largest volcano in the solar system
mars
when a star grows to have an enormous surface, its called what?
a red giant
what is the most unknown dwarf planet
hygiea