The Solar System - Space

☀️ The Sun

A G-type main-sequence star containing 99.86% of the solar system's mass. It fuses 620 million tonnes of hydrogen into helium every second via the proton-proton chain, releasing energy as described by E = mc2. Surface temperature: 5,778 K. Age: 4.6 billion years. Remaining fuel: ~5 billion years.

🌍 Terrestrial Planets

Mercury, Venus, Earth, and Mars are small, rocky, and close to the Sun. Earth is the only known planet with liquid water on its surface and life. Mars has the largest volcano in the solar system (Olympus Mons, 22 km tall) and evidence of ancient liquid water.

🪐 Gas and Ice Giants

Jupiter and Saturn are gas giants; Uranus and Neptune are ice giants. Jupiter's Great Red Spot is a storm larger than Earth, active for at least 350 years. Saturn's rings are made of ice and rock and are only about 10-30 meters thick despite spanning 282,000 km.

🌙 Moons

The solar system has over 290 known moons. Jupiter's Europa has a subsurface ocean under its ice shell and is a top target in the search for extraterrestrial life. Saturn's Titan has lakes of liquid methane. Our Moon stabilizes Earth's axial tilt, making our climate more stable.

☄️ Asteroids and Comets

The asteroid belt between Mars and Jupiter contains millions of rocky bodies. The Oort Cloud, a spherical shell of icy bodies extending to 100,000 AU, is the source of long-period comets. The Chicxulub asteroid impact 66 million years ago caused the mass extinction that ended the non-avian dinosaurs.

🚀 Voyager at the Edge

Voyager 1, launched in 1977, crossed into interstellar space in 2012 and is now over 23 billion km from Earth. It takes light about 22 hours to reach it. Voyager 2 is also in interstellar space. Both carry the Golden Record, a message to any civilization that might find them.