Earth
Solar System
Stars
Black Holes
Universe
100

365 days

How many days in a year?

100

Jupiter

What is the largest planet?

100

Supernova

What occurs when a massive star dies?

100

Event horizon

What is the boundary of a black hole?

100

The Big Bang

What happened in the beginning of the universe?

200

The equator

What line divides the 2 hemispheres?

200

1969

What year did humans reach the Moon?

200

Proxima Centauri

What is the closest star to the Sun?

200

Singularity

What is the center of a black hole?

200

299,792,458 meters per second

What is the speed of light?

300
23.5 degrees
What is Earth's tilt?
300

4.6 billion years

What is the age of the Solar System?

300

An extremely dense and rapidly rotating star with polar jets

What is a neutron star?

300

A highly bright and massive black hole with lots of matter orbiting it

What is a quasar?

300

Dark energy

What is causing the universe's expansion?

400

June 21 & December 22

What are the solstice days?

400

When the Moon is exactly between the Sun and Earth

When does a solar eclipse happen?

400

Sirius

What is the brightest star at night?

400

Sagittarius A*

What is the black hole at the center of the Milky Way?

400

93 billion light years

What is the size of the observable universe?

500

~8 minutes

How much time does it take sunlight to reach Earth?

500

Venus and Uranus

What are the planets that don't spin counterclockwise / do spin clockwise?

500

400 billion

How many stars are in the Milky Way?

500

Phoenix A

What is the largest black hole?

500

General relativity

What is the best and current theory for gravity?