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A "moon" was detected moving away from Mercury in 1974, and was eventually identified as a background star, 31 Crateris. 31 Crateris is a spectroscopic binary with a period of 2.9 days, and this may have been the source of the ultraviolet radiation detected in 1974. [6]
Mercury, the smallest and innermost planet, has no moons, or at least none that can be detected to a diameter of 1.6 km (1.0 mi). [2] For a very short time in 1974, Mercury was thought to have a moon. Venus also has no moons, [3] though reports of a moon around Venus have circulated since the 17th century.
Mercury has "wrinkle-ridges" (dorsa), Moon-like highlands, mountains (montes), plains (planitiae), escarpments (rupes), and valleys . [51] [52] MASCS spectrum scan of Mercury's surface by MESSENGER. The planet's mantle is chemically heterogeneous, suggesting the planet went through a magma ocean phase early in its history. Crystallization of ...
Charon is a relatively large moon in comparison to its primary and also has a very close orbit. This results in Pluto and Charon being mutually tidally locked. Pluto's other moons are not tidally locked; Styx, Nix, Kerberos, and Hydra all rotate chaotically due to the influence of Charon. [17] Similarly, Eris and Dysnomia are mutually tidally ...
The two inferior planets, Mercury and Venus, which have orbits that are smaller than the Earth's, exhibit the full range of phases as does the Moon, when seen through a telescope. Their phases are "full" when they are at superior conjunction , on the far side of the Sun as seen from the Earth.
Mercury retrograde's debut will align with the final new moon of the year, introducing fresh ideas and new perspectives. The new moon cycle is an ideal period to start new projects, take risks ...
A lunar eclipse as viewed from Mercury, captured from the MESSENGER spacecraft. The Moon can be seen falling into the shadow of Earth. The Earth and the Moon also will be very bright, their apparent magnitudes being about −5 [3] and −1.2, respectively. The maximum apparent distance between the Earth and the Moon is about 15′.
The full moon in your sign on the 14th illuminates your personal growth and relationships. ... the planet of love, and Mercury, the planet of communication, has you revisiting past projects ...