1: 1. The universe is expanding at an accelerating rate. 2. There are more stars in the universe than grains of sand on Earth.

2: 3. The sun makes up 99.8% of the solar system's mass. 4. Black holes can bend space and time.

3: 5. The largest known star is 1,700 times bigger than the sun. 6. The universe is 13.8 billion years old.

4: 7. There may be parallel universes existing alongside our own. 8. Space is completely silent, with no air to carry sound waves.

5: 9. Light takes around 100,000 years to travel from one end of the Milky Way to the other. 10. The coldest place in the universe is the Boomerang Nebula.

6: 11. Jupiter's moon, Europa, may have a subsurface ocean. 12. The universe is filled with cosmic microwave background radiation.

7: 13. Astronauts get taller in space due to the lack of gravity. 14. Neutron stars are so dense that a sugar-cube sized amount would weigh as much as Earth.

8: 15. The universe is mostly made up of dark matter and dark energy. 16. The first living beings in space were fruit flies.

9: 17. The known universe contains over 2 trillion galaxies. 18. Earth is the only planet not named after a god or goddess.

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