



us became the first planet to be explored by a spacecraft when NASA’s Mariner 2 successfully flew by the planet at a range of 21,660 miles (34,854 kilometers) on Dec. 14, 1962. During a 42-minute scan, the spacecraft gathered significant data on the atmosphere and surface before continuing to heliocentric orbit.
Since Mariner 2, numerous spacecraft from the U.S. and other space agencies have explored Venus, including NASA’s Magellan. Magellan entered orbit on Aug. 10, 1990, and over the next four years, it used radar to pierce the planet's clouds, providing the first clear views of most of the planet’s surface. It found volcanoes, long lava channels, pancake-shaped domes, and evidence of hot mantle plumes at depth (like the one responsible for creating the Hawaiian islands).
More recently, ESA’s Venus Express orbited from 2006 to 2014. Japan’s Akatsuki Venus Climate Orbiter has been orbiting Venus since 2016.
NASA’s Parker Solar Probe has made multiple flybys of Venus, coming within about 515 miles (830 kilometers) of the surface on July 11, 2020. During that brief encounter, Parker detected a natural radio signal that revealed the spacecraft had flown through the planet’s upper atmosphere. This was the first direct measurement of the Venusian atmosphere in nearly 30 years – and it looked quite different from Venus’s past. A study of data from the Parker mission confirmed that Venus’ upper atmosphere undergoes puzzling changes over a solar cycle, the Sun’s 11-year activity cycle. The research marked the latest clue to untangling how and why Venus and Earth are so different.
