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  2. Rover (space exploration) - Wikipedia

    en.wikipedia.org/wiki/Rover_(space_exploration)

    A rover (or sometimes planetary rover) is a planetary surface exploration device designed to move over the rough surface of a planet or other planetary mass celestial bodies. Some rovers have been designed as land vehicles to transport members of a human spaceflight crew; others have been partially or fully autonomous robots.

  3. List of rovers on extraterrestrial bodies - Wikipedia

    en.wikipedia.org/wiki/List_of_rovers_on...

    A rover is a planetary surface exploration vehicle designed to move over the rough surface of a planet or other celestial body. Rovers are used to explore, collect information, and take samples of the surface. This is a list of all rovers on extraterrestrial bodies in the Solar System.

  4. Planetary science - Wikipedia

    en.wikipedia.org/wiki/Planetary_science

    Analysis of planetary surfaces and surface features is a major component of planetary science. Planetary science (or more rarely, planetology) is the scientific study of planets (including Earth), celestial bodies (such as moons, asteroids, comets) and planetary systems (in particular those of the Solar System) and

  5. Astronomical transit - Wikipedia

    en.wikipedia.org/wiki/Astronomical_transit

    In astronomy, a transit (or astronomical transit) is the passage of a celestial body directly between a larger body and the observer. As viewed from a particular vantage point, the transiting body appears to move across the face of the larger body, covering a small portion of it. [1]

  6. Planetary surface - Wikipedia

    en.wikipedia.org/wiki/Planetary_surface

    Mars is the only other planet to have had its surface explored by a mobile surface probe (rover). Titan is the only non-planetary object of planetary mass to have been explored by lander. Landers have explored several smaller bodies including 433 Eros (2001), 25143 Itokawa (2005), Tempel 1 (2005), 67P/Churyumov–Gerasimenko (2014), 162173 ...

  7. Apparent retrograde motion - Wikipedia

    en.wikipedia.org/wiki/Apparent_retrograde_motion

    The more distant planets retrograde more frequently, as they do not move as much in their orbits while Earth completes an orbit itself. The retrograde motion of a hypothetical extremely distant (and nearly non-moving) planet would take place during a half-year, with the planet's apparent yearly motion being reduced to a parallax ellipse.

  8. Planetary-mass object - Wikipedia

    en.wikipedia.org/wiki/Planetary-mass_object

    A planet is a large, rounded astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. [13] The Solar System has eight planets by the most restrictive definition of the term: the terrestrial planets Mercury , Venus , Earth , and Mars , and the giant planets Jupiter ...

  9. Discovery and exploration of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Discovery_and_exploration...

    As of 2022, three bodies in the Solar System, the Moon, Mars and Ryugu [71] have been visited by mobile rovers. The first robotic rover to visit another celestial body was the Soviet Lunokhod 1, which landed on the Moon in 1970. The first to visit another planet was Sojourner, which