Transit of Earth from Mars

A passage of the earth from the sun of Mars seen takes place when the planet Earth passes directly between the Sun and Mars and a small portion of the disk of the sun for an observer on Mars covered.

During passage of the earth Mars can be seen as a small black disk, which moves over the sun. The case is particularly interesting because the Earth and the Moon can frequently be seen at the Transit together; However, sometimes the ends a passage before the other begins with it. A passage of the Earth from Mars has never been observed, but the next, which takes place on November 10, 2084, could be observed by a hypothetical future Mars colonists. The last such event was held on 11 May 1984.

It can observer on Mars and Mercury and Venus passages, as well as eclipses caused by Phobos and Deimos see. From Mars watched Erddurchgänge follow a 284- year cycle and occur at intervals of 100.5, 79, 25.5, 79 years either in May or in November. This cycle is almost exactly 151 or 284 orbits of Marsumläufen and 133 synodic periods, and is the cycle of earthly Venus passages analogous to follow a cycle of 243 years ( 121.5, 8, 105.5, 8). In an earth continuity from Mars Mars from Earth appear uniformly illuminated with a phase angle of 180 ° ( Vollmar ). This allowed Charles Augustus Young, 1879 to determine the oblateness of Mars, because the measurement is not influenced by Mars phases. He received a value of 1/ 219 or 0.046 ( the modern value is 1/ 193).

Science Fiction

The writer Arthur C. Clarke in his 1971 short story published transit of the Earth tells the story of an astronaut team that flies to Mars, there to observe the transit of the Earth on 11 May 1984.

• Celestial mechanics
• Mars ( Planet)
• Astronomical event