Stars and galaxy's
When does nuclear fusion begin in a star
protostar
what are the outer plants referred as
gas giants
what percent of water is oceans
97%
What do both inner and outer planets have in the middle of them
cores
what does hydrogen turn into during nuclear fusion
helium
what are the dark spots on the sun
sunspot
what is the closest planet to the sun
Mercury
how much of water is in lakes
0.26%
are days shorter or longer the closer you get to the sun
longer
what is the unit of measurement for light
light-year
what happens to a normal star at the end of its life
it turns into a white dwarf
what is the largest planet in our solar system
Jupiter
what is something that holds water
reservoir
what are two things that all outer planets have
rings and moons
how old is our sun
4.6 billion years old
what stars that can turn into black holes
super-giants
what are Neptune and Uranus referred as
Ice giants
can water be in all three forms
yes
what do all planets do
orbit the sun
what type of Galaxy is our milky way
spiral
how much of our solar systems mass is made up by the sun
99.8%
whats the name of the planet furthest from the sun
Neptune
what is water stored in the ground called
ground water
do outer planets have a solid surface
No
how old is our galaxy
13.6 billion years old