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The adjectival forms of the names of astronomical bodies are not always easily predictable. Attested adjectival forms of the larger bodies are listed below, along with the two small Martian moons; in some cases they are accompanied by their demonymic equivalents, which denote hypothetical inhabitants of these bodies.
A long-standing mystery of Venus observations is the so-called ashen light—an apparent weak illumination of its dark side, seen when the planet is in the crescent phase. The first claimed observation of ashen light was made in 1643, but the existence of the illumination has never been reliably confirmed.
Every human language has its own word for the Earth's Moon, and these words are the ones normally used in astronomical contexts.However, a number of fanciful or mythological names for the Moon have been used in the context of astronomy (an even larger number of lunar epithets have been used in non-astronomical contexts).
In the early days, only a very limited number of features could be seen on other Solar System bodies other than the Moon. Craters on the Moon could be observed with even some of the earliest telescopes, and 19th-century telescopes could make out some features on Mars. Jupiter had its famous Great Red Spot, also visible through early telescopes.
Dark spot, may be irregular MA Mare, maria / ˈ m ɑːr iː,-eɪ /, / ˈ m ɑːr i ə / A "sea": on the Moon, a low albedo, relatively smooth plain, generally of large extent; on Mars, dark albedo area, e.g. Mare Erythraeum; on Titan, large expanses of dark materials thought to be liquid hydrocarbons, e.g. Ligeia Mare. ME Mensa, mensae / ˈ m ...
The Sun, planets, moons and dwarf planets (true color, size to scale, distances not to scale) The following outline is provided as an overview of and topical guide to the Solar System: Solar System – gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly.
Francesco Fontana's drawing of the supposed satellite(s) of Venus. Woodcuts from Fontana's work. The fringes of light around Venus are produced by optical effects. Neith is a hypothetical natural satellite of Venus reportedly sighted by Giovanni Cassini in 1672 and by several other astronomers in following years. It was 'observed' up to 30 ...
Lunar: 1,624 craters (31.2%) Venusian: 900 craters (17.3%) Mercurian: 397 craters (7.6%) Martian: 1,092 craters (21.0%) Others: 1,198 craters (23.0%) Distribution of named craters in the Solar System as of 2017. [a] This is a list of craters on Venus, named by the International Astronomical Union's (IAU) Working Group for Planetary System Nomenclature. All craters on Venus are named after ...