- Sunsets on Mars are blue.
- Pluto is smaller than the United States.
- We know more about Mars and our Moon than we do about our oceans.
- Lemons can cost $2,000 each to ship into space.
- Space is full of space junk, which is small micrometeorites or man-made space debris. They are a huge hazard to spacecrafts.
- A year on Venus is shorter than a day there.
- You would last about 15 seconds in space without a spacesuit.
- There's a reason why space appears black. We don't see stars in every direction because some stars haven't been around long enough for their light to reach us.
- The sun makes up 99.8% of the solar system's mass.
- Venus is the hottest planet in the Solar System, even more so than Mercury, despite the latter being closer to the Sun. This is because of Venus’ thick atmosphere, which essentially traps heat in.
- It rains diamonds in Saturn and Jupiter.
- Our moon is moving away from Earth at a rate of 1.6 inch (4 cm) per year.
- Some spacesuit helmets have a Velcro patch, to help astronauts itch.
- Saturn is the only planet that could float in water. (if we had a sea large enough and Saturn wasn’t made mostly out of gas.)
- Asteroids are the byproducts of formations in the solar system, more than 4 billion years ago.
- The first living mammal to go into space was a dog named “Laika” from Russia.
- The word “astronaut” means “star sailor” in its origins.
- “NASA” stands for National Aeronautics and Space Administration.
- Gennady Padalka has spent more time in space than anyone else. He is an RKA cosmonaut and has spent 879 days in space.
- Mercury has no atmosphere, which means there is no wind or weather.
- Neutron stars are city-size stellar objects with a mass about 1.4 times that of the sun.
- Red Dwarf stars that are low in mass can burn continually for up to 10 trillion years.
- There are more trees on Earth than stars in the Milky Way. There are about three trillion trees on our fair planet, and only a measly 100-400 billion stars in the galaxy.
- It would take a modern spacecraft 450,000,000 years to travel to the centre of our galaxy.
- Earth is the only planet not named after a God.
- There are probably more than 1,000,000,000,000,000,000,000,000 (1 septillion) stars in the universe.
- There is probably a supermassive black hole at the centre of our galaxy.
Source: 15 facts about space that will blow your mind
100 Interesting Space Facts That'll Blow Your Mind | The Fact Site