Solar System

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies. Of the objects that orbit the Sun indirectly—the natural satellites—two are larger than the smallest planet, Mercury. The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with the majority of the remaining mass contained in Jupiter. The four smaller inner system planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer system planets are giant planets, being substantially more massive than the terrestrials.

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The European space mission that plans to ambush a comet. Comet Interceptor will be first probe to be parked in space waiting for the ideal target — possibly one from outside the Solar System.

Two New Rocky Planets Discovered Close to the Solar System

video with the orbit of more than 150,000 Asteroids populations in our solar system from Gaia data release 3 (ESA)

Scientists Studying Asteroid Treasure Box Find Most Pristine Solar System Rocks Ever Studied

Samples of the asteroid Ryugu are scientists’ purest pieces of the solar system

What happened before, during and after solar system formation? A recent study of the Asteroid Ryugu holds the answers

Colossal collisions linked to solar system science

Iron meteorites point to millions of years of chaos in early solar system

Ancient Asteroids Reveal That The Early Solar System Was More Chaotic Than We Thought

The Early Solar System was Total Mayhem

Objects That Share the Same Orbit are Common in the Solar System. But we’ve Never Seen co-Orbital Exoplanets. Why?

Compare Sand Dunes Across the Solar System, From Venus to Pluto

A giant planet may have “escaped” from our solar system, the study found

A new kind of solar sail could let us explore difficult places to reach in the solar system using a technique known as diffractive light sailing. The NIAC is supporting it with a Phase III grant

A new Kind of Solar Sail Could let us Explore Difficult Places to Reach in the Solar System

The 'Hypatia' meteorite bears the imprint of a supernova before the birth of the solar system.

Humanity's most distant spacecraft is sending back weird signals from beyond our solar system

Early Inner Solar System was Very Chaotic, Research Suggests

Webb telescope nearly set to explore the solar system

Fusion rocket will allow us to 'leave Solar System and conquer own planets'