Stars
What is the name of our home star?
The Sun, or Sol
What is our home galaxy called?
The Milky Way
How many planets are there?
(Not including dwarf planets)
8
How big is a light year?
6 trillion miles
What is the largest black hole?
TON-618
What is the nearest star to the sun?
Proxima Centauri and/or Alpha Centauri
What galaxy is closest to ours?
Where is the asteroid belt?
Between Mars and Jupiter
How fast does light travel?
300,000 kilometers per second, or
186,000 miles per second
What is the densest star known?
R136A1
What color is the hottest for stars?
Blue
How many stars are in our galaxy?
100-400 billion
What is the name of the belt beyond Neptune?
The Kuiper Belt
How big is the observable universe?
93 billion light years
If the Earth collapsed into a black hole, how small would it be?
The size of an average golf ball
What is the biggest star?
Stephenson 2-18
What is at the center of every major galaxy?
A supermassive black hole.
When did our solar system form?
4.5 billion years ago
How big is one AU (Astronomical Unit)?
The distance from Earth to the sun, or 93 million miles.
Who started using telescopes to look at the night sky?
Galileo Galilei
What are stars doing at their cores?
Fusing elements like hydrogen
What is our black hole called?
Sagittarius A*
What is the name of the hypothetical sphere of bodies surrounding the solar system?
The Oort Cloud
Exactly 30.0 AU
When will Saturn lose its rings?
In 100-300 million years