Space Facts for Kids

Blast off on a cosmic adventure through the stars with these 30 out-of-this-world space facts! Space is a vast and mysterious place that has intrigued humans for centuries. From planets and stars to galaxies and black holes, the universe is filled with incredible phenomena waiting to be discovered. Perfect for young astronomers and aspiring astronauts, these facts will take you on a journey beyond our Earth and into the depths of space. So strap in and get ready to explore the wonders of the cosmos!

30 Space Fun Facts for Kids

  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 year on Mercury is just 88 days long.
  4. Mars is known as the Red Planet because of its reddish appearance, caused by iron oxide (rust) on its surface.
  5. Jupiter is the largest planet in our solar system, and it has the most moons.
  6. Saturn isn’t the only planet with rings. Jupiter, Uranus, and Neptune have rings too.
  7. Uranus rotates on its side, making its seasons very different from Earth’s.
  8. A day on Venus is longer than a year on Venus.
  9. Neptune was the first planet found by mathematical prediction rather than observation.
  10. The Milky Way galaxy is estimated to contain 100-400 billion stars.
  11. The Sun makes up about 99.86% of the Solar System’s mass.
  12. You would weigh less on Mars than on Earth because of the lower gravity.
  13. The Sun is an average-sized star.
  14. One million Earths could fit inside the Sun.
  15. The Moon is slowly moving away from Earth, at about an inch per year.
  16. Astronauts in space can grow up to two inches taller due to the lack of gravity.
  17. The Hubble Space Telescope orbits the Earth and has taken some of the most detailed images of outer space.
  18. The footprints left by astronauts on the Moon will be there for millions of years because there is no wind to blow them away.
  19. A light year is the distance light travels in one Earth year, about 5.88 trillion miles.
  20. The universe is believed to be around 13.8 billion years old.
  21. The largest known star, UY Scuti, is about 1,700 times larger than the Sun.
  22. Black holes can have the mass of millions of stars but take up no space.
  23. The first man-made object sent into space was in 1957 when the Soviet Union launched Sputnik.
  24. One day on Pluto is about 153 hours long.
  25. There are more stars in the universe than grains of sand on all the beaches on Earth.
  26. The International Space Station (ISS) travels at a speed of 17,500 miles per hour.
  27. The closest galaxy to us is the Andromeda Galaxy.
  28. The temperature in the void of space is about -270.45 degrees Celsius.
  29. The first person to walk on the Moon was Neil Armstrong in 1969.
  30. Venus spins in the opposite direction to most planets in our solar system.


Q: Can you breathe in space?
A: No, space has no air or atmosphere, so it’s impossible to breathe without a spacesuit and oxygen supply.

Q: How do astronauts sleep in space?
A: Astronauts sleep in a special sleeping bag that can be attached to the wall so they don’t float around.

Q: Why do stars twinkle?
A: Stars twinkle because of the Earth’s atmosphere. When starlight enters our atmosphere, it is affected by winds and temperature changes, making it appear to twinkle.

Q: Is the Sun a star?
A: Yes, the Sun is a medium-sized star and the closest one to Earth.

Q: How many planets are in our solar system?
A: There are eight planets in our solar system.

These facts are just a small glimpse into the vast and amazing universe that surrounds us. Each one opens up new possibilities for learning and exploring the wonders of space.