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Kepler-186f [2] [3] (also known by its Kepler object of interest designation KOI-571.05) is an Earth-sized exoplanet orbiting within the habitable zone of the red dwarf star Kepler-186, [4] [5] [6] the outermost of five such planets discovered around the star by NASA's Kepler space telescope.
From the total of 5,086 stars known to have exoplanets (as of January 26, 2024), there are a total of 1,033 known multiplanetary systems, [1] or stars with at least two confirmed planets, beyond the Solar System. This list includes systems with at least three confirmed planets or two confirmed planets where additional candidates have been proposed.
As of January 2022, there are 457 minor planets known or suspected to have moons. [1] Discoveries of minor-planet moons (and binary objects, in general) are important because the determination of their orbits provides estimates on the mass and density of the primary, allowing insights into their physical properties that are generally not ...
This is a list of confirmed exoplanets within the circumstellar habitable zone that are either under 10 Earth masses or smaller than 2.5 Earth radii, and thus have a chance of being rocky. [3] [1] Note that inclusion on this list does not guarantee habitability, and in particular the larger planets are more unlikely to have a rocky composition. [4]
The median of the likely orbits is 12.4 days. Its orbit would likely have an eccentricity of 0.24 or less. [118] It could have lakes of molten lava and would be far too close to Alpha Centauri B to harbour life. [119] If confirmed, this planet might be called Alpha Centauri Bc. However, the name has not been used in the literature, as it is not ...
Centaurs have unstable orbits in which the perihelion (q) is well inside of Neptune's orbit but the farthest point (aphelion, Q) is very distant. The first TNO to be discovered was Pluto in 1930. It became the namesake of a larger group of resonant objects called plutinos (another such resonant subgroup are the twotinos ).
That hypothetical outer planet must have an orbital radius beyond 16.4 AU for planetary system to remain stable. [ 16 ] The low metallicity of the star at a metallicity (dex) of -0.26, or to put it another way, about half that of the Sun's, [ 6 ] is associated with a decreased chance of planets overall and giant planets specifically but an ...
The sizes are listed in units of Jupiter radii (R J, 71 492 km).This list is designed to include all planets that are larger than 1.6 times the size of Jupiter.Some well-known planets that are smaller than 1.6 R J (17.93 R 🜨 or 114 387.2 km) have been included for the sake of comparison.