Space Trivia

Sun

 * 1) The Sun is the biggest known object in the Solar System, taking 98% of its mass.
 * 2) The Sun does not have a surface, because it is a star.
 * 3) The Sun is the only star in the Solar System.

Mercury

 * 1) Mercury has the biggest temperature range (between -300 F and 800 F)
 * 2) Although Mercury is the closest to the Sun, it is not the hottest planet.
 * 3) Mercury, along with Venus, Mars, Jupiter, and Saturn can be seen with the naked eye.
 * 4) Mercury, along with Venus, doesn't have a moon.

Venus

 * 1) Venus is the hottest planet, able to reach temperatures as high as 900 F.
 * 2) Venus' atmosphere is 100 times denser than Earth's atmosphere.
 * 3) When Venus was young-aged, it possibly had oceans that went to 2 kilometers deep, are today vanished due to the intense heat.
 * 4) Venus is the second-brightest light in the night sky, right after the Moon.
 * 5) Venus is the brightest of all planets in the night sky. Mercury, Mars, Jupiter and Saturn are able to be seen with the naked eye.
 * 6) Venus, along with Mercury, do not have one or more moons.

Earth

 * 1) Earth is the biggest terrestrial planet in the Solar System, but not in the universe.
 * 2) Earth is the only terrestrial planet with solar eclipses.
 * 3) Earth is the only body in the universe to have known life.
 * 4) Earth is the fifth-biggest planet, after all four gas giants.

Mars

 * 1) Olympus Mons is three times taller than Mount Everest, the highest mountain on Earth.
 * 2) Even more impressive, Olympus Mons sticks above the clouds of Mars.
 * 3) Mars, along with Mercury, Venus, Jupiter, and Saturn can be seen without any special tools from Earth.

Jupiter

 * 1) Jupiter is the biggest planet in the Solar System, at over 142,000 km in diameter, but not in the universe.
 * 2) Jupiter is the second-brightest planet in the sky, after Venus.
 * 3) Those two planets, along with Mercury, Mars, and Saturn may be seen in the night sky and have been known for centuries.
 * 4) Jupiter has the most moons circling it, at 69 moons
 * 5) Jupiter, along with Saturn, Uranus, and Neptune, have rings.

Saturn

 * 1) Saturn is the second-biggest planet in the Solar System.
 * 2) Saturn, along with Mercury, Venus, Mars, and Jupiter are seeable in the night sky, so they have been known for thousands of years.
 * 3) Saturn is the furthest planet to be bright enough to be seen in the night sky.
 * 4) Even though, Saturn's rings were not discovered until 1610.

Uranus

 * 1) Uranus is the first planet to be discovered and unknown to the ancients, in 1781.
 * 2) Uranus is the only gas giant with all its moons to have official names.
 * 3) Uranus may reach the coldest temperatures today.
 * 4) Uranus is difficult to see, as it is too far and too small away. However, it looks like a faint star if you have good vision.

Neptune

 * 1) Neptune is the first planet that cannot be seen with even good vision. Neptune requires at least binoculars.
 * 2) Neptune is the windiest planet known in the Solar System.
 * 3) Neptune has the smallest number of moons.
 * 4) Even though, 1 moon hasn't been given an official name yet.

Pluto

 * 1) Pluto has the most moons for a dwarf planet, which are five (Charon, Nix, Hydra, Kerberos, Styx).
 * 2) Pluto was classified as a planet until 2006, because it was too small.
 * 3) Pluto crosses Neptune's orbit, but will never collide.

Ceres

 * 1) Ceres is the only dwarf planet without any moons.