A star in the center of the Solar System
Perfect sphere of hot plasma
Source of energy for life on Earth
A year on Mercury is 88 days long
Smallest planet in the Solar System
Most cratered planet in the Solar System
Named after the Roman deity Mercury
A day on Venus lasts longer than a year
Rotates in the opposite direction
Second brightest object in the night sky
Atmospheric pressure is 92x greater than Earth's
Often called the Earth's sister planet
Only astronomical object known to harbor life
Formed over 4.5 billion years ago
Earth's gravity interacts with other objects in space
Named after the Roman god of war
Similar landmass to Earth's
Only 16 of the 39 Mars missions have been successful
2.5 times more massive than other planets combined
Made primarily of gases
Known as a “gas giant”
A flattened ball
The first astronomers thought the rings were moons
Has only been visited 4 times by spacecraft
Saturn has 62 moons
A gas giant with a radius 9x bigger than Earth's
Discovered by Sir William Herschel in 1781
Turns on its axis once every 17 hours, 14 minutes
Makes one trip around the Sun every 84 Earth years
Known an “ice giant” planet because of cold temp.
Takes 164.8 Earth years to orbit the Sun
Discovered by Jean Joseph Le Verrier
Named after Roman God of the Sea
Second largest gravity in the solar system