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An alternative possibility is that 55 Cancri e is a solid planet made of carbon-rich material rather than the oxygen-rich material that makes up the terrestrial planets in the Solar System. [25] In this case, roughly a third of the planet's mass would be carbon, much of which may be in the form of diamond as a result of the temperatures and ...
A proposal that diamonds may also form in Jupiter and Saturn, where the concentration of carbon is far lower, was considered unlikely because the diamonds would quickly dissolve. [16] Experiments looking for conversion of methane to diamonds found weak signals and did not reach the temperatures and pressures expected in Uranus and Neptune.
First extrasolar planet discovered by indirect imaging (visible light) Found in 2020 to be a debris cloud from a collision of asteroids rather than a planet 2015 NameExoWorlds Tadmor: Ancient Palmyrene and modern Arabic name for Palmyra: Gamma Cephei A (Errai) 1.85 903.3 2.05 radial vel. 2003 45.0 1.4 2015 NameExoWorlds Meztli
Theia, an ancient planet, collided with Earth to form the moon, scientists believe. A new study suggests Theia could have also formed mysterious blobs called large low-velocity provinces, or LLVPs.
While no scientist has stated to believe GJ 1214 b is an ocean planet, if GJ 1214 b is assumed to be an ocean planet, [22] i.e. the interior is assumed to be composed primarily of a water core surrounded by more water, proportions of the total mass consistent with the mass and radius are about 25% rock and 75% water, covered by a thick envelope ...
Pluto's reign. For decades, students learned the phrase "My Very Educated Mother Just Served Us Nine Pizzas" to remember the order of the planets in the solar system: Mercury, Venus, Earth, Mars ...
This list of exoplanets discovered in 2025 is a list of confirmed exoplanets that were first reported in 2025. For exoplanets detected only by radial velocity , the listed value for mass is a lower limit.
This planet may have been captured into the pulsar's orbit, a process which is particularly likely within the packed environment of a globular cluster, [15] and may be about 12.6 billion years old, making it the oldest-known planet. [k] [77] Its existence may demonstrate that planets can form in metal-poor medium including the globular clusters ...