There is no clear evidence of such a landing. So the answer is NEVER.
A terrestrial environment is the Earth's natural land and atmosphere.
"Terra" is the Latin for land or earth. It would therefore follow that Earth is "terrestrial".
Terrestrial animals are those that live on the land, either entirely or mostly. "Terre" means earth, terrestrial means "of the earth".
"Terrestrial" means "pertaining to land". The word comes from the latin root "terre" (pronounced "tare"), meaning "land", and is related to the word "terrain".
No, terrestrial means 'related to or occurring on the earth or on land'. The sun is a star, not a planet.
The meaning of the word terrestrial is something that is related to land or to the planet Earth. For example a terrestrial animal is one that lives on land as opposed to in water.
Terrestrial means "of the earth" and is used to describe planets with a solid surface. The terrestrial planets are Mercury, Venus, Earth and Mars.
As far as is known to the public, no human has ever stepped on any planet but earth. The only extra-terrestrial body to have been reached by people so far is the moon ... a satellite of earth.
You have that backwards. "Terra" is the root word -- Latin for "earth" or "land." "Terrestrial" means of or on the land or earth. This is also where we get "terra firma," firm earth; "terrier," a dog that burrows into the earth; "terrain," the lay of the earth; "territory," an area of earth; and Terre Haute, Indiana.
Of or pertaining to the earth; existing on the earth; earthly; as, terrestrial animals., Representing, or consisting of, the earth; as, a terrestrial globe., Of or pertaining to the world, or to the present state; sublunary; mundane., Consisting of land, in distinction from water; belonging to, or inhabiting, the land or ground, in distinction from trees, water, or the like; as, terrestrial serpents., Adapted for the observation of objects on land and on the earth; as, a terrestrial telescope, in distinction from an astronomical telescope., An inhabitant of the earth.
The likely word is "terrestrial" (of the Earth, or land-dwelling).
Terrestrial refers to things having to do with the land. Biodiversity is the variation of life forms within a given ecosystem or biome. Combine the two, and there you go! (Terrestrial Biodiversity: the variation of life forms within a given ecosystem or biome that refers to species that inhabit the land.)