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Top 100 Interesting Facts About Space

Space has fascinated man since the very beginning, there’s a whole universe of mystery and beauty still waiting to be discovered, but not all of it is a mystery.

Here we’re going to look at the top 100 interesting facts about space that are truly out of this world!

  1. Mercury and Venus are the only two planets in our solar system that do not have any moons.
  2. If a star passes too close to a black hole, it can be torn apart.
  3. The hottest planet in our solar system is Venus. Most people often think that it would be Mercury, as it’s the closest planet to the sun. This is because Venus has a lot of gasses in its atmosphere, which causes the “Greenhouse Effect.”
  4. The solar system is around 4.6 billion years old. Scientists estimate that it will probably last another 5,000 million years.
  5. Enceladus, one of Saturn’s smaller moons, reflects some 90% of the sunlight, making it more reflective than snow.
  6. The highest mountain known to man is the Olympus Mons, which is located on Mars. Its peak is 15 miles (25 km) high, making it nearly 3 times higher than Mount Everest.
  7. The Whirlpool Galaxy (M51) was the very first celestial object to be identified as being spiral.
  8. A light-year is the distance covered by light in a single year; this is equivalent to 5.88 trillion miles (9.5 trillion km).
  9. The width of the Milky Way is around 100,000 light-years.
  10. The Sun is over 300,000 times larger than Earth.
  11. Footprints and tire tracks left by astronauts on the Moon won’t disappear as there is no wind to blow them away.
  12. Because of lower gravity, a person who weighs 220 lbs. (100 kg) on Earth would only weigh 84 lbs. (38 kg) on the surface of Mars.
  13. Scientists believe there are 67 moons that orbit Jupiter, however only 53 of these have been named. Jupiter also has the most moons in our galaxy.
  14. The Martian day is 24 hours 39 minutes and 35 seconds long.
  15. NASA’s Crater Observation and Sensing Satellite (LCROSS) declared that they have found evidence of significant amounts of water on the Earth’s Moon.
  16. The Sun makes a full rotation once every 25-35 days.
  17. Earth is the only planet not named after a god.
  18. The force of gravity can sometimes cause comets to tear apart.
  19. It is thanks to the Sun and our own moons gravity that we have high and low tides.
  20. Pluto is smaller than the Earth’s moon. It’s even smaller in diameter than the United States.
  21. According to mathematics, white holes are possible, although as of yet we have found none.
  22. Our moon is around 4.5 billion years old.
  23. There are more volcanoes on Venus than any other planet within our solar system.
  24. Uranus’ blue glow is down to the methane in its atmosphere, which filters out all the red light.
  25. The four planets in our solar system that are known as gas giants are Jupiter, Neptune, Saturn and Uranus.
  26. Uranus has 27 moons that have been discovered so far. It has 5 large moons, and 22 small moons. Titania is the largest of the moons.
  27. Because of its unique tilt, a single night on Uranus is equivalent to 21 Earth years.
  28. Triton, one of Neptune’s moons, is gradually getting closer to the planet it orbits. Scientists believe that eventually Triton will get so close to Neptune, it will be torn apart by gravity, and Neptune could end up with more rings than Saturn currently has.
  29. The only large moon in our solar system to orbit in the opposite direction of its planet is Neptune’s moon, Triton.
  30. There are more stars in space than there are grains of sand on every beach in the world.
  31. Neptune takes 164.79 years (60,190 days) to make one orbit of the Sun. this means that since its discovery in 1846, it has only completed just one orbit!
  32. Charon is one of the moons of Pluto, and is only slightly smaller than Pluto itself.
  33. The Space Station is the largest manned object ever sent into space.
  34. A day on Pluto lasts for 6 days and 9 hours.
  35. Saturn is the second largest planet in our solar system. It has a radius of 36,184 miles (58,232 km).
  36. Any free-moving liquid in outer space will form itself into a sphere, because of its surface tension.
  37. Earth, Mars, Mercury and Venus are called the inner planets as they are closest to the sun.
  38. We know more about space than we do about deep in our oceans.
  39. The only satellite that Britain has launched was called Black Arrow. Black Arrow was developed during the 1960’s and was used for four launches between 1969 and 1971.
  40. 68% of the universe is dark energy, and 27% is dark matter; both are invisible, even with a telescope. This means we have only seen 5% of the universe from earth.
  41. The light takes 8.3 minutes to travel from the Sun the Earth.
  42. At any given moment, there are 1,800 thunderstorms happening on Earth. This amounts to 16 million storms each year.
  43. The Earth’s revolution time increases .0001 seconds annually.
  44. If you were driving at 75 miles (121 km) per hour, it would take 258 days to drive around one of Saturn’s rings.
  45. Neil Armstrong was the first man to walk the moon, on 20th July 1969. He first stepped on the moon with his left foot.
  46. The Space Station circles the earth every 90 minutes.
  47. Stars seem to twinkle in the night sky due to the light being disrupted as it passes though the Earth’s atmosphere.
  48. We always see the same side of the Moon, no matter where we stand on Earth.
  49. There are three main types of galaxies out in space, and they are spiral, elliptical, and irregular.
  50. There are approximately 200 billion stars in the Milky Way.
  51. In the northern skies, you are able to see two galaxies. These are the Andromeda Galaxy (M31), and the Triangulum Galaxy (M33).
  52. In 2016, scientists detected a radio signal from a source 5 billion light-years away. This means that when the signal started its journey, Earth didn’t even exist.
  53. The closest galaxy to us is the Andromeda Galaxy, it’s estimated to be 2.537 million light-years away.
  54. The first Supernovae observed outside of our own galaxy was the S Andromeade, in the Andromeda galaxy in 1855.
  55. The Andromeda Galaxy appears in the night sky as a smudge of light, and is in fact the furthest away object in the night sky that you can see with your eyes.
  56. The distance between the Sun and Earth is defined as an Astronomical Unit or AU for short.
  57. The second man on the moon was Buzz Aldrin. “Moon” was Aldrin’s mother’s maiden name.
  58. On Venus, it snows metal and rains sulphuric acid.
  59. The Mariner 10 is the only spacecraft that has ever visited the planet Mercury. It managed to take pictures of about 45% of the surface.
  60. If you shouted in space even if someone was right next to you they wouldn’t be able to hear you. This is because there is no air in space, and air is needed to carry the sound vibrations.
  61. Coca-Cola was the first drink that was ever consumed in space.
  62. Due to the lack of gravity in space, astronauts can grow approximately two inches (5 cm) in height.
  63. The Kuiper Belt is a region of the Solar System beyond the orbit of Neptune.
  64. The first woman in space was a Russian called Valentina Tereshkova.
  65. If Saturn’s rings were a meter long, they would be 10,000 times thinner than a razorblade.
  66. As of spring 2011, the Hubble Space Telescope had travelled around the globe over 115,000 trips. This equates to over 3.1 billion miles (around 5 billion km), or the length of a trip to Neptune from Earth.
  67. The first artificial satellite in space was called “Sputnik.”
  68. The furthest away galaxy from Earth, that has been discovered, is GRB 090423, which is 13.6 billion light years away! This means that the light we see from it began its journey only 600,000 years after the Universe was created!
  69. The center of the Milky Way smells like rum and tastes like raspberries.
  70. Our moon is moving away from Earth at a rate of 1.6 inch (4 cm) per year!
  71. Pluto is named after the Roman god of the underworld, not the Disney Dog.
  72. Inside an astronaut’s spacesuit helmet, there is a Velcro patch. The only purpose for this is to help the astronauts with an itch.
  73. When fully constructed, the Space Station will be visible for more than 90% of the Earth’s population.
  74. Although Saturn is the second largest planet in our solar system, it is also the lightest planet!
  75. Asteroids are the byproducts of formations in the solar system, more than 4 billion years ago.
  76. Astronauts can’t burp in space. The liquids and gasses in your stomach don’t separate in zero gravity.
  77. It’s impossible to whistle in a spacesuit.
  78. Uranus was originally called “George’s Star.” The name “Uranus” was proposed in 1782, but not official until 1850.
  79. A sunset on Mars is blue.
  80. Saturn’s density is low enough that the planet would float in water.
  81. The mass of the Moon is about one-eightieth of the Earth’s mass.
  82. The first living mammal to ever go into space was a dog named “Laika” from Russia.
  83. The term “astronaut” is derived from the Greek words “ástron”, meaning “star”, and “nautes”, which means “sailor”. So, the word astronaut means star sailor!
  84. “NASA” stands for National Aeronautics and Space Administration.
  85. Sergei K. Krikalev has spent more time in space than anyone else. He has racked up a total of 803 days, 9 hours and 39 minutes, which is equivalent to 2.2 years! He retired from spaceflight in 2007.
  86. Mercury has no atmosphere which means there is no wind or weather.
  87. In China, the Milky Way is known as the “silver river.”  In Japan and Korea “silver river” means galaxies in general, not just the Milky Way.
  88. Red Dwarf stars that are low in mass can burn continually for up to 10 trillion years!
  89. There is an estimated 2 x 1023 stars in space. In English, this is: 200,000,000,000,000,000,000,000,000,000!
  90. Scientists used to believe that the same side of Mercury always faced the Sun. However, in 1965 astronomers discovered that the planet rotates three times during every two orbits it makes.
  91. Jupiter is known as the dumping grounds for our solar system, as a large percentage of asteroids are pulled in by Jupiter’s gravity.
  92. A day on Mercury is equivalent to 58 Earth days, and a year is equivalent to 88 days.
  93. As space has no gravity, normal pens won’t work.
  94. On average it takes the light only 1.3 seconds to travel from the Moon to the Earth.
  95. There are 88 recognized star constellations in our night sky.
  96. The center of a comet is called a nucleus.
  97. As early as 240 B.C. the Chinese began to document the appearance of Halley’s Comet.
  98. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet.
  99. There are 5 dwarf planets officially recognised in our Solar System, these are: Ceres, Pluto, Eris, Haumea and Makemake.
  100. Buzz Lightyear (from Toy Story) has actually been out in space! He has spent 15 months on board the International Space Station, and returned to Earth on the 11th September, 2009.


About the Author

Luke Ward
Luke Ward is the founder of The Fact Site. He's a professional blogger & researcher with over 10 years’ experience in fact finding, SEO & web design. In his spare time he loves to travel and drink coffee.


  1. Jeff - 14 February 2019 - Reply

    Why did a astronaut bring a buzz toy to space?

  2. Art - 3 September 2018 - Reply

    #13 says Jupiter has the most moons in our galaxy. I don’t believe that can be verified. Maybe they meant in our solar system?

  3. Yacqub Hassan - 22 February 2018 - Reply

    Same here and it wont last another 5 million years!!!!!

    • Lincoln Kilday - 30 October 2018 - Reply

      5 thousand, or 5 billion

  4. Shankar Bhandari - 12 December 2017 - Reply

    The sun is nearly 1000000 times larger than the earth….. which is equal to cube of 109…….

    • Chase Serrapica - 14 February 2018 - Reply

      noboby cares

  5. Jana Haitham - 15 September 2017 - Reply

    What is the white hole???

  6. Msgana Berhe - 11 May 2017 - Reply


  7. Lawlzer - 20 March 2017 - Reply

    If you go into a blackhole, it’s impossible to escape, well, let me try to explain (I’m not an astro-physisist, so my explanations may be terrible)
    A blackhole has a, what we call, the “event horizon,” which is basically the point where nothing can escape, ever. (Even light!) So, if you went close to the event horizon, it would be hard to escape, but if you had certain stuff, possible. If you went into the event horizon, you would be “Spaghettified,” aka your body would stretch and stretch until you died, as the parts closer to the blackhole would expand, further away from would be smaller.
    If the blackhole reaches a sun, or anything, the sun would go into it, and the blackhole would expand with the extra mass. Holy length!

  8. Patric Decentaurus - 16 February 2017 - Reply

    What’s full name of R136a1…

    • Luke Ward - 17 February 2017 - Reply

      It’s full name is actually RMC 136a1 – although it’s usually abbreviated to R136a1.

  9. Dr Dre - 16 November 2016 - Reply

    it will then create a wormhole!I

  10. Yaz - 14 October 2016 - Reply

    what do you mean by white hole?

  11. Dean Denton - 8 August 2016 - Reply

    Thank you for these excruciating, competent and superlative facts, well done!

  12. Cory Matthews - 13 June 2016 - Reply

    In fact 13 it says that Jupiter has 64 moons, but in fact 52 it says Jupiter has 63 moons, which is correct?

    • Luke Ward - 17 June 2016 - Reply

      Thanks for letting us know! We’ve updated this now as more have been discovered since this article was written, but Jupiter has 53 moons which have been named, and another 14 moons have been discovered, that’s 67 in total!

      • Cory Matthews - 17 June 2016 - Reply

        You’re welcome! Wow, that’s a lot of moons!

  13. Luke Ward - 25 May 2016 - Reply

    That’s a good point! Thanks for correcting us, I’ve updated it :)

  14. Nick - 24 December 2015 - Reply

    2 is most certainly wrong.. didn’t read any after that. There are over 100 million. Sorry this was just a sad attempt..

  15. yolo - 28 March 2014 - Reply

    no.41 mistake for minutes

  16. poopp:) - 13 March 2014 - Reply

    thnx im using some of these for an essay:)))))

  17. Ken M - 31 January 2014 - Reply

    8. It’s 6 *Trillion* (not billion)

    11. First, it’s tire, not tyre. Second, they’ll be gone eventually due to the moon’s constant bombardment of microparticles that hit it every day. These particles would normally burn up in the atmosphere, but there is none, so they erode them away.

    89. If there are 2 x 10^23 stars in space, the number would be 200,000,000,000,000,000,000,000. You were missing 6 zeros.

    92. Mecury Day is 58 days, It’s year is 88 days

    93. Normal pens won’t work.

    These were just the ones I caught from skimming the beginning and end of the article.

  18. S. Fry (Not the famous one) - 19 January 2013 - Reply

    44. ‘If you was driving at 75 miles (121 km) per hour, it would take 258 days to drive around one of Saturn’s rings.’

    Should be if you *WERE driving.

    56. ‘The distance between the Sun and Earth is define as a Astronomical Unit, or AU for short.’

    Should be *AN Astronomical Unit.

    Sorry to be a pedant, but those basic English mistakes take away from the otherwise brilliant list.

    On a lighter note, I love your site, keep up the good work.

    • Luke Ward - 21 January 2013 - Reply

      Thank you Non-famous Steven Fry, these mistakes were corrected :)

  19. Kyouki - 9 November 2012 - Reply

    I see multiples…

    • Luke Ward - 13 November 2012 - Reply

      Where? And I’ll update it.

      • Kyouki - 14 November 2012 - Reply

        86 and 71

        • Luke Ward - 17 November 2012 - Reply

          Thanks! These have been changed now.

    • Luke Ward - 11 December 2012 - Reply

      There were multiple facts the same, I’ve changed them now though.

  20. PSY - 9 October 2012 - Reply

    Oppa Gangnam Style

  21. Jimmy - 3 July 2012 - Reply


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