The solar system

mercury Closest to the sun Travels around the sun faster than any other planet (88 days to completely orbit) Smallest planet (~continental US) Daytime temps can reach 840 F and nighttime temps can get as low as -275 F No water but possible presence of ice

venus 2nd closest to the sun; closest planet to Earth Earth’s “twin” Clouds are made mostly of poisonous sulfuric acid Due to greenhouse effect, temps can reach up to 870 F Brightest planet

mars 4th closest to the sun Has seasons but atmosphere is too thin for liquid water to exist for long on the surface Two moons (Phobos and Deimos) Twice as big as the moon but half as big as Earth

Mars’ riverbeds

Jupiter 5th planet from the sun Largest planet in the solar system (2.5x more massive than all of the other planets in the solar system combined) Fastest spinning planet (10 hours) 67 moons

Saturn 6th planet from the sun Gas giant, but possible rocky core Roughly 0.9 billion miles from the sun 150 moons

uranus 7th planet from the sun Rotates at a 90 degree angle (possibly due to collision with some other body) Originally thought to be a star Bright blue-green due to methane gas in its atmosphere 64 Earths could fit inside it

neptune 8th planet from the sun (2.8 billion miles) Smallest of the gas giants Coldest planet in the solar system Existence was predicted before it was ultimately found Considered an “ice giant” due to water, ammonia and methane ices under its atmosphere

The solar system Name the 8 planets in order of distance from the sun. Which planets are outer/gas planets? Which planets are inner/terrestrial planets? Which planets have rings? Which planets do not have moons?