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 and Beyond A RSS news feed containing the latest NASA press releases on missions exploring our solar system and beyond.
NASA Hosts Science Chat on Upcoming Historic...
on September 17, 2018 at 8:27 pm
Members of NASA’s New Horizons spacecraft team will host a Science Chat at 1 p.m. EDT Wednesday, Sept. 19, on humanity’s farthest planetary flyby, scheduled to occur Jan. 1 when the spacecraft encounters a mysterious object in the Kuiper Belt nicknamed “Ultima Thule.&rdquo […]
NASA Hosts Live Science Chat: One Year After...
on August 20, 2018 at 3:48 pm
On the one-year anniversary of the historic 2017 Eclipse Across America, NASA will host a Science Chat at 10:30 a.m. EDT, Tuesday, Aug. 21, to discuss new science data and the public impact of the celestial event experienced by millions. […]
NASA, ULA Launch Parker Solar Probe on Historic...
on August 12, 2018 at 8:16 am
Hours before the rise of the very star it will study, NASA’s Parker Solar Probe launched from Florida Sunday to begin its journey to the Sun, where it will undertake a landmark mission. The spacecraft will transmit its first science observations in December, beginning a revolution in our understanding of the star that makes life on Earth possible. […]
Mars Terraforming Not Possible Using Present-Day...
on July 30, 2018 at 3:00 pm
Transforming the inhospitable Martian environment into a place astronauts could explore without life support is not possible without technology well beyond today’s capabilities because Mars does not retain enough accessible carbon dioxide that could be put back into the atmosphere to warm the planet. […]
NASA’s MAVEN Spacecraft Finds That “Stolen”...
on July 23, 2018 at 3:00 pm
NASA’s MAVEN spacecraft just found a new type of Martian aurora that occurs over much of the day side of the Red Planet, where auroras are very hard to see. […]
NASA’s Fermi Traces Source of Cosmic Neutrino...
on July 12, 2018 at 2:01 pm
For the first time ever, scientists using NASA’s Fermi Gamma-ray Space Telescope have found the source of a high-energy neutrino from outside our galaxy. […]
NASA Completes Webb Telescope Review, Commits to...
on June 27, 2018 at 4:30 pm
The Independent Review Board (IRB) established by NASA to assess progress on its James Webb Space Telescope has unanimously recommended that development on the world’s premier science observatory should continue; NASA has established a new launch date for Webb of March 30, 2021. […]
Our Solar System’s First Known Interstellar...
on June 27, 2018 at 4:02 pm
Using observations from NASA’s Hubble Space Telescope and ground-based observatories, an international team of scientists have confirmed ′Oumuamua (oh-MOO-ah-MOO-ah), the first known interstellar object to travel through our solar system, got an unexpected boost in speed and shift in trajectory as it passed through the inner solar system last year. […]
NASA Hosts Media Teleconference on Status of...
on June 26, 2018 at 8:55 pm
NASA will host a media teleconference at 1 p.m. EDT, Wednesday, June 27, to provide an update on the agency’s James Webb Space Telescope and the findings of an external independent review board. […]
NASA Finds Ancient Organic Material, Mysterious...
on June 7, 2018 at 4:54 pm
NASA’s Curiosity rover has found new evidence preserved in rocks on Mars that suggests the planet could have supported ancient life, as well as new evidence in the Martian atmosphere that relates to the search for current life on the Red Planet. […]
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.
Martian moon may have come from impact on home...
on September 24, 2018 at 6:40 pm
Phobos, the larger of Mars' two tiny satellites, is the darkest moon in the solar system. This dark aspect inspired the hypothesis that the close-orbiting moon may be a captured asteroid, but its orbital dynamics seemed to disagree. A new study suggests Phobos' composition may be more like the volcanic crust of the Red Planet than it appears, consistent with an origin for the moon in an ancient, violent impact on Mars. […]
Four extremely young asteroid families identified
on September 24, 2018 at 6:40 pm
Researchers dated the families using a numerical simulation method to process current data to go back in time to the asteroid formation era. […]
Ancient Mars had right conditions for underground...
on September 24, 2018 at 2:20 pm
A new study shows that the breakdown of water molecules trapped in ancient Martian rocks likely produced enough chemical energy to sustain microorganisms for hundreds of millions of years beneath the Red Planet's surface. […]
Ice volcano activity on dwarf planet Ceres
on September 17, 2018 at 3:15 pm
Ice volcanoes on the dwarf planet Ceres generate enough material to fill one movie theater each year, new calculations show. […]
Evidence of early planetary shake-up
on September 10, 2018 at 3:12 pm
Scientists have studied an unusual pair of asteroids and discovered that their existence points to an early planetary rearrangement in our solar system. […]
Legacy of NASA's Dawn, near the end of its mission
on September 7, 2018 at 9:59 pm
NASA's Dawn mission is drawing to a close after 11 years of breaking new ground in planetary science, gathering breathtaking imagery, and performing unprecedented feats of spacecraft engineering. […]
Pluto should be reclassified as a planet, experts...
on September 7, 2018 at 3:04 pm
The reason Pluto lost its planet status is not valid, according to new research. […]
Mysterious 'lunar swirls' point to moon's...
on September 6, 2018 at 4:33 pm
The mystery behind lunar swirls, one of the solar system's most beautiful optical anomalies, may finally be solved. The solution hints at the dynamism of the moon's ancient past as a place with volcanic activity and an internally generated magnetic field. It also challenges our picture of the moon's existing geology. […]
New exoplanet found very close to its star
on September 5, 2018 at 8:19 pm
Using data from NASA's Kepler Space Telescope, an international team has discovered a new exoplanet twice the size of Earth. It orbits its star every six days and is thus very close to it, about 10 times closer than Mercury is to the Sun. […]
Saturn's famous hexagon may tower above the clouds
on September 5, 2018 at 7:54 pm
The long-lived international Cassini mission has revealed a surprising feature emerging at Saturn's northern pole as it nears summertime: a warming, high-altitude vortex with a hexagonal shape, akin to the famous hexagon seen deeper down in Saturn's clouds. […]