Astronomy Facts & Trivia - Page 2

Galaxies Everything moves: Planets move within the Solar System, which moves within Milky Way Galaxy, which moves within The Local Group of Galaxies, which moves towards Virgo
venus Venus and Uranus are the only planets that rotate clockwise (retrograde rotation.)
Uranus All 27 of Uranus moons are named after William Shakespeare and Alexander Pope characters.
planet jupiter With 63 moons, Jupiter has the largest number of moons.
jupiter, saturn, uranus and neptune Jupiter, Saturn, Uranus and Neptune are made up of just gas with no solid surface to land on.
mercury The temperature on Mercury varies so extremely that it will rise up to 430C during the day and drop as low as -140C at
VY Canis Majoris and Sun The largest known star VY Canis Majoris is so big that if our Sun were a ball 117 cm (46 in) wide, Canis Majoris would be 2.25 kilometres (1.3 miles) wide.
Pistol Star The Pistol Star is the most luminous star known - 10 million times the power of the Sun and as big as the size of Earth's entire orbit around the Sun. Submitted by: damandude - Missouri, United States
Mars Mars is red because its soil is very rusty (iron oxide.)
Constellation Crux Crux is the smallest of modern constellations, with only 4 bright stars.
Constellation Hydra The largest of modern constellations is
Earth is the only planet not named after a Roman or Greek god.
Saturn's moon Titan Saturn's moon Titan has hundreds of times more oil and natural gas than all the known reserves on Earth.
Interstellar space is not complete vacuum: there are a few hydrogen atoms per cubic centimetre.
If a pinhead-size piece of the Sun were placed on Earth, one would have to stand as far as 145 kilometres (90 miles) away to be safe.
diamond star lucy The star "Lucy" in constellation Centaurus is actually a huge cosmic diamond of 10 billion trillion trillion
neutron star A neutron star has such density that a teaspoonful of its matter would weigh more than all the people on Earth. Submitted by: Nicci - Jacksonville, North Carolina, United States
mercury ice craters Even though it is closest to the Sun, Mercury has ice in its craters.
pluto charon ratio Due to its size, Pluto's moon Charon is also considered to be a double dwarf planet (two planets orbiting each other), rather than a moon orbiting its planet.
planet jupiter Jupiter is so big that twice the mass of the rest of our Solar System's planets combined would still not be enough to equal its mass.