Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid
These are organized by a classification scheme developed exclusively for Cosma. More…
Solar System : the sun together with the group of celestial bodies that are held by its attraction and revolve around it; also : a similar system centered on another star — Webster
Solar System is the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies. Of the objects that orbit the Sun indirectly, the moons, 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 most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed mostly of substances with relatively high melting points compared with hydrogen and helium, called volatiles, such as water, ammonia and methane. All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic. — Wikipedia
Solar System (Eric Weisstein’s World of Astronomy, Wolfram Research)
Planets (Eric Weisstein’s World of Astronomy, Wolfram Research)
David Darling’s Internet Encyclopedia of Science, Encyclopædia Britannica
Encyclopedia of the Solar System
Note: These are 360° Videos — press and hold to explore!
Note: This is a 360° Video — press and hold to explore it!
Solar System (Space Place, NASA)
Solar System Explorer (Space Place, NASA)
NASA Virtual Field Trip: Solar System Math
Our Solar System (Ask an Astronomer, Cornell University)
The Nine Planets Solar System Tour
Solar System (Cosmos4Kids)
Solar System, More than Planets (Cosmos4Kids)
Solar System II| Exploration (Cosmos4Kids)
Solar System News -- ScienceDaily Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.
'Bathtub rings' around Titan's lakes might be...
on June 24, 2019 at 3:15 pm
The frigid lakeshores of Saturn's moon Titan might be encrusted with strange, unearthly minerals, according to new research. […]
Astronomers see 'warm' glow of Uranus's rings
on June 20, 2019 at 7:35 pm
Two telescopes have measured the faint heat from the main, or epsilon ring, of Uranus, enabling astronomers for the first time to determine its temperature: a cool 77 Kelvin. Earlier images of the rings came from reflected light only. The observations also show that the rings lack dust, which is common in the rings of other planets, and are composed of centimeter-sized particles and larger. […]
NASA's Cassini reveals New Sculpting in Saturn...
on June 17, 2019 at 8:46 pm
As NASA's Cassini dove close to Saturn in its final year, the spacecraft provided intricate detail on the workings of Saturn's complex rings, new analysis shows. […]
Sun's history found buried in Moon's crust
on June 17, 2019 at 8:46 pm
The Sun's rotation rate in its first billion years is unknown. Yet, this spin rate affected solar eruptions, influencing the evolution of life. Scientists think they've figured it out by using the Moon as critical evidence. […]
Meteors help Martian clouds form
on June 17, 2019 at 4:51 pm
Researchers think they've solved the long-standing mystery of how Mars got all of its clouds. […]
Saturn's moon Mimas: A 'snowplough' in the...
on June 11, 2019 at 5:39 pm
Researchers have shown that Mimas, one of Saturn's moons, acted as a kind of remote snowplough, pushing apart the ice particles that make up the rings. […]
Mass anomaly detected under the moon's largest...
on June 10, 2019 at 2:06 pm
A mysterious large mass of material has been discovered beneath the largest crater in our solar system -- the Moon's South Pole-Aitken basin -- and may contain metal from the asteroid that crashed into the Moon and formed the crater, according to a new study. […]
Site of biggest ever meteorite collision in the...
on June 10, 2019 at 12:59 pm
Scientists believe they have discovered the site of the biggest meteorite impact ever to hit the British Isles. […]
Exomoons may be home to extra-terrestrial life
on June 4, 2019 at 5:11 pm
New research looks at the possibility of moons outside our solar system causing gaps in the rings of planet J1407b. […]
Astronomers find 'Forbidden' planet in 'Neptunian...
on May 28, 2019 at 11:30 pm
An exoplanet smaller than Neptune with its own atmosphere has been discovered in a region close to its star where no Neptune-sized planets would normally be found. […]