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Our immediate celestial neighborhood, consisting of a central star—the Sun—eight official planets, dozens of dwarf planets, and hundreds of moons. It stretches across billions of kilometers of cosmic space, bound together by powerful gravitational forces.
The Sun constitutes an astonishing 99.86% of all the mass in the entire Solar System. The remaining fraction is composed mostly of Jupiter and Saturn, leaving Earth and other planets as tiny cosmic dust specks by comparison.
Venus rotates in the opposite direction (retrograde) compared to most other planets, and it spins incredibly slowly. A single day (one rotation) on Venus lasts 243 Earth days, which is longer than its entire orbital year of 225 Earth days.
Mars is home to Olympus Mons, the largest volcano in the Solar System. Standing at over 21.9 kilometers (13.6 miles) high, it is roughly two and a half times taller than Mount Everest and is wide enough to cover the entire state of Arizona.
Jupiter possesses a magnetic field fourteen times stronger than Earth's, making it the largest coherent structure in the Solar System besides the heliosphere. If it were visible to the naked eye from Earth, it would appear twice as large as the full Moon.
Neptune experiences supersonic winds that can reach up to 2,100 kilometers per hour. These are the fastest recorded wind speeds in the Solar System, powered by the planet's radiating internal heat contrasted against freezing open space.
Liquid water is not unique to Earth. Jupiter’s moon Europa and Saturn's moon Enceladus both harbor global sub-surface liquid oceans beneath thick icy crusts. These outer-system moons are considered the primary candidates in the search for extraterrestrial life.