20 Amazing Space Facts

1. Space is completely silent because there is no air to carry sound.

2. The hottest planet in our solar system is Venus, not Mercury.

3. A day on Venus is longer than a year on Venus.

4. Neutron stars are so dense that a sugar-cube-sized amount would weigh about a billion tons.

5. The Sun accounts for 99.86% of the total mass of the solar system.

6. There are more stars in the universe than grains of sand on all Earth's beaches.

7. Space is not completely empty; it contains cosmic dust, gas, and dark matter.

8. Saturn could float in water because it is mostly made of gas.

9. Black holes are invisible because their gravity prevents even light from escaping.

10. The footprints on the Moon will remain for millions of years since there is no wind or water.

11. Jupiter has the shortest day of all planets, lasting just about 10 hours.

12. The largest volcano in the solar system is on Mars, called Olympus Mons.

13. The Milky Way galaxy is on a collision course with the Andromeda galaxy.

14. A single teaspoon of a neutron star would weigh about 6 billion tons.

15. Uranus rotates on its side, unlike any other planet in the solar system.

16. The Great Red Spot on Jupiter is a storm that has lasted for over 350 years.

17. There may be a planet made of diamond in the universe, called 55 Cancri e.

18. The first woman in space was Valentina Tereshkova from the USSR in 1963.

19. One million Earths could fit inside the Sun.

20. Pluto, once considered the ninth planet, is now classified as a dwarf planet.