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An animation explaining why the planet Mercury may appear to move "backwards", or retrograde across Earth's sky. Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point.
Mercury is the first planet from the Sun and the smallest in the Solar System. In English, it is named after the ancient Roman god Mercurius , god of commerce and communication, and the messenger of the gods. Mercury is classified as a terrestrial planet, with roughly the same surface gravity as Mars.
An undiscovered moon orbiting the planet was hypothesized to exist in the early 1970s, but it turned out to be misinterpreted data from the star 31 Crateris. [1] Observation of a moon of Mercury from Earth would be difficult because Mercury is relatively close to the Sun. [2] For example, Mercury was not observed in the infrared spectrum until ...
The planets Pluto, Neptune, Uranus, Saturn, Jupiter, and Mercury are in retrograde right now. here's what retrograde means and how it will affect your zodiac sign.
This summer, five planets in the sky will be retrograde at the same time: Mercury, Saturn, Jupiter, Pluto, and Neptune. Make the most of the months ahead so you're prepared for the incoming ...
The transit of Mercury on May 9, 2016. Mercury is visible to the lower left of center. A sun spot is visible above center. Mercury transiting the Sun as viewed by the rover Curiosity on Mars (June 3, 2014). [1] A transit of Mercury across the Sun takes place when the planet Mercury passes directly between the Sun and a superior planet.
Counter-Earth, a planet situated on the other side of the Sun from that of the Earth. Fifth planet (hypothetical), historical speculation about a planet between the orbits of Mars and Jupiter. Phaeton, a planet situated between the orbits of Mars and Jupiter whose destruction supposedly led to the formation of the asteroid belt. This hypothesis ...
The outer planets Jupiter, Saturn, Uranus and Neptune, compared to the inner planets Earth, Venus, Mars, and Mercury at the bottom right The four outer planets, called giant planets or Jovian planets, collectively make up 99% of the mass orbiting the Sun. [ h ] All four giant planets have multiple moons and a ring system, although only Saturn's ...