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Mercury stations direct on January 1, 2024, in Sagittarius. ... Although communication and travel plans could get complicated, especially before family gatherings, this retrograde is a step in the ...
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.
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.
Following Mercury retrograde, Mercury will station direct on Aug. 28, marking the end of a period of reflection and the beginning of forward momentum
Precise observations of the perihelion shift of Mercury constrain other parameters, as do tests of the strong equivalence principle. One of the goals of the BepiColombo mission to Mercury, is to test the general relativity theory by measuring the parameters gamma and beta of the parametrized post-Newtonian formalism with high accuracy.
A Mercury-bound spacecraft launched from Earth must travel 91 million kilometers into the Sun's gravitational potential well. [12] Starting from the Earth's orbital speed of 30 km/s, the change in velocity ( delta-v ) the spacecraft must make to enter into a Hohmann transfer orbit that passes near Mercury is large compared to other planetary ...