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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Welcome To Chariklo, A Ringed World In The Solar System Just Examined By The Webb Telescope

A New View of the Most Explosive Moon in the Solar System

Searching for dark matter in our solar system

Europe's JUICE spacecraft is all ready to embark on an eight-year odyssey through the Solar System to find out whether the oceans hidden under the surface of Jupiter's icy moons have the potential to host extraterrestrial life

Exploring the Outer Solar System Takes Power, Here’s a Way to Miniaturize Nuclear Batteries for Deep Space

How was the solar system formed? The Ryugu asteroid is helping us learn

2 Earth-size worlds revealed beyond our solar system

‘Presolar’ meteorite grains, older than our Solar System, may have formed in steps not predicted by conventional theory — research that may aid understanding of nanoparticle formation, and how stars evolve

Bright green comet a rare 'messenger from the outer reaches of our solar system,' astronomers say

The first life in our solar system may have been on Mars

After 50,000 years, a comet is returning to the inner solar system. Here's how to see it

Astronomers find 2nd Earth-size planet in intriguing alien solar system

Space hotels are a classic Sci-Fi trope. But American hospitality giant Hilton recently signed a deal with Lockheed Martin and Voyager Space to build the solar system’s first space hotel onboard Starlab — a space station with NASA funding — which is currently under development.

Scientists will present new research from NASA at the 241st meeting of the American Astronomical Society (AAS), on topics ranging from the universe’s early galaxies to planets outside our solar system

Little ‘hurricanes’ around young stars can be used to study planet formation in other star systems, towards better understanding how our own Solar System evolved

Marine Science Goes to Space - Space and ocean scientists take a splash course in multidisciplinary science to chart our solar system’s ocean worlds

All planets in the solar system visible in night sky at same time on Wednesday

The most distant spacecraft in the solar system — Where are they now?

Every planet in the solar system visible in rare "planet parade"

Every planet in the solar system visible in rare "planet parade"