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…
Jovian planets, after Jupiter, are also called giant planets or gas giants. However, many astronomers apply the latter term only to Jupiter and Saturn, classifying Uranus and Neptune, which have different compositions, as ice giants. Both names are potentially misleading: all of the giant planets consist primarily of fluids above their critical points, where distinct gas and liquid phases do not exist. The principal components are hydrogen and helium in the case of Jupiter and Saturn, and water, ammonia and methane in the case of Uranus and Neptune. Many extrasolar giant planets have also been identified orbiting other stars. — Wikipedia
Ring system is a disc or ring orbiting an astronomical object that is composed of solid material such as dust and moonlets, and is a common component of satellite systems around giant planets. A ring system around a planet is also known as a planetary ring system.
The most prominent and most famous planetary rings in the Solar System are those around Saturn, but the other three giant planets (Jupiter, Uranus, and Neptune) also have ring systems. Recent evidence suggests that ring systems may also be found around other types of astronomical objects, including minor planets, moons, and brown dwarfs. — Wikipedia
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A new classification scheme for exoplanet sizes
on September 24, 2018 at 12:50 pm
There are about 4433 exoplanets in the latest catalogs. Their radii have generally been measured by knowing the radius of their host star and then closely fitting the lightcurves as the planet transits across the face of the star. The radius of the host star is thus a key parameter and latest data release of the Gaia mission has enabled astronomers to improve the accuracy of stellar properties in its catalog very significantly – to a precision in radius of about 8 percent—for nearly […]
Halfway mark for NOEMA construction
on September 19, 2018 at 12:40 pm
The completion of NOEMA phase 1, the first phase of the NOEMA project will be officially celebrated this Wednesday, September 19th. IRAM and its partner institutes have completed the first, decisive step towards one of the most important German-French-Spanish initiatives in astronomy: developing the most powerful and most sensitive telescope at millimetre wavelengths in the Northern hemisphere. Four years after the inauguration of the first NOEMA antenna, 10 15-meter dishes currently constitute […]
Halving greenhouse gas emissions by 2030: Roadmap...
on September 14, 2018 at 1:00 pm
A new report shows the potential for all sectors of global economy—energy, food and agriculture, industry, buildings and transport—to halve greenhouse gas emissions by around 2030. Stronger policies, the digital revolution and greater climate leadership are necessary to accelerate the economic transformation, say the authors. […]
World faces uphill climate fight as US efforts...
on September 12, 2018 at 6:19 pm
The United States will fall short on its Paris commitment to cut greenhouse gases, making the uphill battle to avoid runaway global warming that much harder, according to a report released hours ahead of a major, solutions-oriented climate summit in San Francisco. […]
Landslides, avalanches may be key to long-term...
on September 11, 2018 at 12:00 pm
The release of gases through sublimation is the defining process of comets, but a new paper by Planetary Science Institute Research Scientist Jordan K. Steckloff and Senior Scientist Nalin H. Samarasinha says that periodic landslides and avalanches, known as mass wasting, may be responsible for keeping comets active over a long time. […]