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  2. List of adjectivals and demonyms of astronomical bodies

    en.wikipedia.org/wiki/List_of_adjectivals_and...

    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.

  3. Planetary nomenclature - Wikipedia

    en.wikipedia.org/wiki/Planetary_nomenclature

    Exceptions to this rule are valleys and craters on Mars and Venus; naming conventions for these features differ according to size. One feature classification, regio, was originally used on early maps of the Moon and Mercury (drawn from telescopic observations) to describe vague albedo features. It is now used to delineate a broad geographic region.

  4. Venus - Wikipedia

    en.wikipedia.org/wiki/Venus

    Because of the retrograde rotation, the length of a solar day on Venus is significantly shorter than the sidereal day, at 116.75 Earth days (making the Venusian solar day shorter than Mercury's 176 Earth days — the 116-day figure is close to the average number of days it takes Mercury to slip underneath the Earth in its orbit [the number of ...

  5. Astronomical naming conventions - Wikipedia

    en.wikipedia.org/wiki/Astronomical_naming...

    Earth, when viewed as a planet, is sometimes also called by its Latin scientific conventional name Terra, this name is especially prevalent in science fiction where the adjective "terran" is also used in the way which "Lunar" or "Jovian" is for Earth's moon or Jupiter. The Latin convention derives from the use of that language as an ...

  6. Naming of moons - Wikipedia

    en.wikipedia.org/wiki/Naming_of_moons

    The one known moon (at the time) of Neptune was not named for many decades. Although the name Triton was suggested in 1880 by Camille Flammarion, it did not come into general use until the mid 20th-century, and for many years was considered "unofficial". In the astronomical literature it was simply referred to as "the satellite of Neptune".

  7. Planets in astrology - Wikipedia

    en.wikipedia.org/wiki/Planets_in_astrology

    The Moon moves the fastest and so is considered to form the first celestial sphere above Earth. Everything below the Moon is part of the sublunary sphere. Mercury moves the second fastest and so rules the next highest sphere. Next is Venus, who takes about 260 days to revolve around the Sun. Following that is the Sun, then Mars, Jupiter and Saturn.

  8. Planetary symbols - Wikipedia

    en.wikipedia.org/wiki/Planetary_symbols

    The origins of the planetary symbols can be found in the attributes given to classical deities. The Roman planisphere of Bianchini (2nd century, currently in the Louvre, inv. Ma 540) [2] shows the seven planets represented by portraits of the seven corresponding gods, each a bust with a halo and an iconic object or dress, as follows: Mercury has a caduceus and a winged cap; Venus has a ...

  9. List of natural satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_natural_satellites

    Nineteen moons are large enough to be round, and two, Titan and Triton, have substantial atmospheres The number of moons discovered in each year until November 2019. 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 ...