Timeline of the universe
how many years ago did the big bang happen?
13.7 billion years ago
what was the first element created?
hydrogen
What do all of the planets in our solar system orbit?
the sun
immediately after the big bang what happened?
The universe became hot and dense
What is it called when an areas gravity is so strong it pulls everything near it?
a blackhole
when someone specializes in studying the origin of the universe:
a cosmologist
When was background radiation detected?
1964
what is it called when a star collapses in on itself?
supernova
another name for a small planet (but lacking criteria to be classified as a real planet):
dwarf planet
When did planets form?
1 BY
when a piece of an asteroid or comet enter the Earth's atmosphere, what is its new name?
a meteor
how many planets are in our solar system?
8
what created helium?
nuclear fusion
how fast does light travel per second?
186,000 miles per second
what is the sixth planet from the sun?
saturn