🔬 Science & Research

Astronomy basics

The solar system, stars, light years and how we know any of it.

8questions

easydifficulty

+16max XP (1st try)

not rated yet

Question 1 of 8

A light year measures:

Question 2 of 8

Stars shine because of:

Question 3 of 8

The Sun is classified as:

Question 4 of 8

We know distant galaxies are receding because their light is:

Question 5 of 8

The Moon always shows Earth the same face because:

Question 6 of 8

A planet, by the current IAU definition, must:

Question 7 of 8

A black hole's event horizon is:

Question 8 of 8

Seasons on Earth are caused by:

0/8 answered