stars have planetary systems. The 21st century has become a golden era of planetary system discovery. 4,801 such exoplanets in 3552 planetary systems have...

Planetary science (or planetology) is the organized study of planets, which are relatively large, stable bodies in orbits around stars. The planet best...

A planetary nebula is a nebula that is made up of gas and plasma. They are made by certain types of stars later in their life. They look like planets...

A planetary parade (or planetary alignment, planetary procession) occurs when some of the planets in the Solar System appear to be close to each other...

A planetary ring is a ring made of dust and other particles orbiting around a planet in a flat-disc shaped region. The gas giants Jupiter, Saturn, Uranus...

In planetary science, planetary differentiation is the process of separating out different parts of a planetary body where the planetary body develops...

Planetary geology (or astrogeology or exogeology) focuses on the geology of any astronomical object like a planet, moon, asteroid, comet or meteorite...

Kepler's laws of planetary motion are three laws that describe the motion of planets around the sun: Planets move around the sun in elliptic orbits. The...

Planetary degassing is the process by which gases trapped inside a planet are released to the surface and atmosphere. This usually happens through volcanic...

Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and maintain environments that are hospitable to life...

A planetary symbol is a symbol used in astrology, and usually, in astronomy, too. It is used for the planets, dwarf planets, the Moon, and the Sun. This...

Planetary-mass object, planetary body or planemo is the name used to define objects having mass to be round, but not enough to host nuclear fusion like...

The planetary core is the innermost layer or layers in a planet. The terrestrial planets (planets with a rocky surface) have a core mainly made of iron...

A mantle is a layer inside a planetary body that is between the core and the crust of a planetary body. Mantles are made of rock or ices. They are generally...

Group for Planetary System Nomenclature (WGPSN), which maintains the astronomical naming conventions and planetary nomenclature for planetary bodies, and...

Lunar and Planetary Science Conference. 18: 964–965. Bibcode:1987LPI....18..964S. "Oberon Nomenclature Table Of Contents". Gazetteer of Planetary Nomenclature...

The rings of Uranus are planetary rings (circles of rock and dust) around the planet Uranus. There are 13 rings in total. In order of increasing distance...

The Planetary Missions Program Office is a part of NASA that is located at the Marshall Space Flight Center. It was started in 2014 by NASA for the Discovery...

These and other members are linked by gravity and by their history as a planetary system. There are many kinds of systems. The key is that the elements...

approved by the IAU Working Group on Planetary System Nomenclature on January 21, 2005. IAU Working Group for Planetary System Nomenclature IAUC 8116: Satellites...

diameter of Aldebaran is 61,277,920 km which is 38,076,334 miles. The planetary exploration probe Pioneer 10 is heading in the general direction of the...

when stars are forming and are very hot, causing the plasma to heat up. Planetary nebulae are made when where a dying star has thrown off its outer layers...

J. “Sol Planetary System Data.” Princeton University, The Trustees of Princeton University, 1996, https://www.princeton.edu/~willman/planetary_systems/Sol/...

and its moons. It was the first spacecraft to do so. "Planetary Names". Gazetteer of Planetary Nomenclature. United States Geological Survey. Retrieved...

center of the Crab Nebula and is a neutron star. Other nebulae may form as planetary nebulae. This is the final stage of a low-mass star's life, like Earth's...

2007-10-12. Retrieved 2007-12-09. "USGS Astrogeology: Gazetteer of Planetary Nomenclature - Planetary Body Names and Discoverers". Archived from the original on...

(pronounced /ˈroʊʃ/), or Roche radius, is a planetary distance. Inside the Roche limit, orbiting material will form planetary rings. Outside the limit, material...

name". Jennifer Blue (2009-11-09). "Gazetteer of Planetary Nomenclature". IAU Working Group for Planetary System Nomenclature (WGPSN). Retrieved 2010-08-30...

carefully, they saw that the planets were not moving in perfect circles. In a planetary system, planets, dwarf planets, asteroids and other minor planets, comets...

elements are as of January 2000. They are changing a lot due to Solar and planetary perturbations. Nicholson, S. B. (October 1938). "Two New Satellites of...

before. These things included the first planetary fly-by, the first pictures from another planet, the first planetary orbiter, and the first gravity assist...

elements are as of January 2000. They are changing a lot due to Solar and planetary perturbations. In February and March 2007, the New Horizons spacecraft...

definition for: accumulation, collision, and fragment. "ALMA Reveals Planetary Construction Sites". Retrieved 21 December 2015. This short article about...

calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923. Johannes Kepler proposes his three laws of planetary motion....

Harrison, et al. "Taking The Measure of Makemake's Moon." AAS/Division for Planetary Sciences Meeting Abstracts. Vol. 48. 2016. This short article about science...

(exoplanets) have been discovered in 3,629 planetary systems (January 2022 data). The count includes 808 multi-planetary systems. Known exoplanets range in size...

An extrasolar planet (or exoplanet) is a natural planet in a planetary system outside our own solar system. A related concept is an exomoon, a natural...

In planetary science, volatiles are the group of chemical elements and compounds with a low boiling point. They are often found in the crust or atmosphere...

be torn apart. Some fragments will fall on Mars and some will form a planetary ring or rings around Mars. The other moon, Deimos, is the smaller of the...

was an American geologist. He was one of the founders of the field of planetary science. He was best known for co-discovering the Comet Shoemaker–Levy...

The rings of Saturn are the planetary rings around the planet Saturn, which can be seen with a small telescope. They consist of many small particles,...

S2CID 120372170. Archived from the original on 2019-12-13. Retrieved 2018-01-28. "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 2008-10-24...

is a planetary nebula in the constellation Vulpecula. It is about 1,360 light years away from earth. The Dumbbell nebula was the first planetary nebula...

orbiting the star. It is the third closest known star to the Sun which has a planetary system, after Epsilon Eridani (10.5 ly) and Gliese 674 (14.8 ly). Two...

about a planet or other far away thing. As a tool of space exploration a planetary probe may land on the planet, or orbit around it, or merely fly by closely...

Pease 1 is a planetary nebula. It is in the globular cluster Messier 15 in the constellation of Pegasus. It is the first planetary nebula discovered within...

known asteroids were counted among the planets, and each had its own planetary symbol. Vesta was represented by a stylized hearth, currently . Old graphic...

ChemRxiv: This is the chemistry version of arXiv EarthArXiv: Earth science & planetary science version of arXiv medRxiv: Medicine version of arXiv. It includes...

2013-10-15. Retrieved 2008-08-28. "Gazetteer of Planetary Nomenclature". Working Group for Planetary System Nomenclature (WGPSN). U.S. Geological Survey...

with other astronomical objects. The name conflicts are usually with planetary satellites. After the discovering astronomer discovers a planet, they...