- 1. The largest discovered black hole is TON 618. It has a mass of about 66 billion times the mass of the Sun.
- 2. The ISS (International Space Station) orbits Earth about once every 90 minutes.
- 3. There are approximately 200 billion trillion stars in the universe.
- 4. Light from the Sun takes about 8 minutes 20 seconds to reach Earth.
- 5. The temperature of space is about 2.7 degrees Kelvin (-270.45°C, -454.81°F)!
- 6. Ganymede is the largest moon in the solar system, and is larger than Mercury.
- 7. Vanguard 1, launched in 1958, is the oldest satellite that is still in orbit around the Earth.
- 8. The fastest-spinning pulsar, named PSR J1748-2446ad, rotates 43,000 times per minute.
- 9. Neptune has the strongest winds in the solar system, with wind speeds reaching more than 1,200 miles per hour (2,000 kilometers per hour)!
- 10. The moon is moving away from Earth slowly.
- 11. The Milky Way galaxy will collide with the Andromeda galaxy in about 4 billion years.
- 12. A day on Venus takes about 243 Earth days.
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