In dictionaries:
solar thermal system
Converts sunlight to thermal energy.
small solar system bodies
small Solar System body
(astronomy) A body in the Solar System other than a planet, dwarf planet or natural satellite.
the solar system
inner Solar System
(astronomy) The area of the Solar System that comprises certain objects that are relatively close to the Sun, including Mercury, Venus, Earth and Mars, while not including the other planets.
outer Solar System
(astronomy) The area of the Solar System that comprises certain objects that are relatively far from the Sun, including Jupiter, Saturn, Uranus and Neptune, while not including the other planets.
Formation and evolution of the Solar System
There is evidence that the formation of the Solar System began about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.
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