What is the name of the galaxy that contains our solar system?
AnswerMilky Way
Our solar system lies in the Milky Way, a barred spiral galaxy.
Science · Facts & stats
Cosmos facts & stats
7 fact-checked facts about the cosmos, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
How many planets are in our solar system?
Answer8
There are eight planets; Pluto was reclassified as a dwarf planet in 2006.
Going deeper
About how long does sunlight take to reach Earth?
AnswerAbout 8 minutes
Light covers the roughly 150 million km from the Sun to Earth in about 8 minutes 20 seconds.
What is a light-year a measure of?
AnswerDistance
A light-year is the distance light travels in one year, about 9.46 trillion km.
What is the nearest large spiral galaxy to the Milky Way?
AnswerAndromeda
The Andromeda Galaxy, about 2.5 million light-years away, is the closest large spiral galaxy to ours.
Expert level
About how far from the Sun is Proxima Centauri, the nearest known star?
AnswerAbout 4.2 light-years
Proxima Centauri lies about 4.24 light-years away, part of the Alpha Centauri star system.
What is the boundary around a black hole beyond which nothing, not even light, can escape?
AnswerEvent horizon
Once anything crosses a black hole's event horizon, it cannot escape, not even light.
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