Probes do not last long on its surface, where the atmosphere is 50 times denser than Earth's and temperatures are hot enough to melt lead. Orbital studies hint that Venus may have hosted habitable oceans before becoming inhospitable. By studying Venus, scientists learn how Earth-like planets change over time.
India aims to launch a Venus orbiter called Shukrayaan in December 2024 equipped with a radar, infrared camera, and international instruments to map the surface.
NASA’s DAVINCI will be the first mission to visit the Venusian atmosphere since 1984, providing the most detailed measurements we’ve ever had of its composition and structure.
The European Space Agency's Venus Express studied the planet's ionosphere and atmosphere, enabling scientists to draw important conclusions about the surface.
NASA's MESSENGER spacecraft flew past Venus twice on its way to Mercury.
NASA's Magellan orbiter mapped over 98% of Venus at a resolution of 100 meters or better using its radar.
The Soviet Union's Venera 11 and 12 spacecraft studied Venus' atmosphere and landed on the surface. They were also meant to return color images but the lens caps failed to pop off. Their data gave evidence of lightning and thunder in Venus' atmosphere, and discovered carbon monoxide at low altitudes.
NASA's Pioneer Venus mission sent 2 spacecraft to study the planet. Pioneer 1 was an orbiter that made a radar map of the surface, while Pioneer 2 consisted of four atmospheric probes. One of the probes survived to transmit data for over an hour after it impacted with the surface.
The Venera 10 spacecraft separated into two different sections — an orbiter and a lander — on October 23, 1975. Two days later, the lander touched down on the surface of Venus 2,200 kilometers from the Venera 9 lander, somewhere within a 150-kilometer (93-mile) radius of 15.42° N, 291.51° E. With the orbiter acting as a relay, the lander transmitted images from the surface as well as data about clouds and the surface environment.
The Venera 9 lander separated from the orbiter on October 20, 1975. Two days later, the lander touched down and became the first spacecraft to transmit a picture from the surface of another planet. It landed within a 150-kilometer (93-mile) radius of 31.01° N, 291.64° E. In addition, the lander sent back information on the Venusian clouds, atmospheric composition, and light levels. All of the information was transmitted from the surface to the orbiter, which then relayed the signal to Earth. Besides acting as a data relay, the orbiter also studied the cloud structure of the planet.
Launch: November 3, 1973
Venus flyby and gravity assist: February 5, 1974
Mariner 10 flew by Venus for a gravity assist on its way to Mercury. It flew within 4,200 kilometers (2,600 miles) of Venus and took the first ultraviolet images of the planet.
Upon Venus arrival Venera 8 used aerobraking to decelerate, and then deployed a parachute. A refrigeration unit cooled the spacecraft's components, protecting them from the intense heat as the lander descended to the surface. Once on the ground, the spacecraft transmitted data for 50 minutes, confirming a very high surface temperature and crushing atmospheric pressure. It also measured the light level on Venus’ surface and found it suitable for surface photography, setting the stage for the images to be returned by Venera 9, 10, 13, and 14.
When Venera 7 arrived it deployed a parachute and began its descent to the surface. Scheduled to take 60 minutes to descend, the probe touched down in only 35 minutes, possibly because its parachute may have been damaged by high winds. The spacecraft then transmitted a weak signal for 23 minutes, becoming the first spacecraft to return data from the surface of another planet. It reported surface temperatures of 475 degrees Celsius (887 degrees Fahrenheit) and atmospheric pressures 90 times greater than Earth's.
The twin Venera 5 and 6 spacecraft arrived within a day of each other at Venus, after which they deployed parachutes and descended through the atmosphere. Both spacecraft relayed data for about 50 minutes before succumbing to crushing atmospheric pressures. Venera 5 and 6 allowed us to more precisely determine Venus' atmosphere and confirm its carbon dioxide dominant composition.
Mariner 5 flew within 4,000 kilometers (2,400 miles) of the Venusian cloud tops. During its flyby, the spacecraft measured a surface temperature of 267 degrees Celsius (513 degrees Fahrenheit).
When Venera 4 arrived at Venus it dropped several instruments, including a thermometer and a barometer, into the atmosphere. It received data back from these probes before it deployed a parachute and descended into the atmosphere itself. Preliminary readings seemed to indicate that the probe had taken measurements all the way down to the surface, but later analysis suggested that the crushing atmosphere damaged the spacecraft at an altitude of almost 25 kilometers. The probe revealed an atmosphere made almost entirely of carbon dioxide, with temperatures ranging from 40 degrees Celsius (104 degrees Fahrenheit) high up in the atmosphere to 280 degrees Celsius (536 degrees Fahrenheit) closer to the surface, and pressures ranging from 15 to 22 atmospheres.
Venera 3 was the first spacecraft to land on (impact) another planet, but no data was returned. It is believed that Venus' thick atmosphere and crushing pressure destroyed the spacecraft on its way to the surface.
Venera 2 flew within 24,000 kilometers (about 14,900 miles) of Venus on February 27, 1966, but communications with the spacecraft were lost just before its close approach to the planet.
Communications with the spacecraft were lost while on its way to Venus.
The final stage of the rocket carrying the spacecraft into orbit failed and it was unable to achieve the necessary trajectory to carry it on to Venus.
The Soviet Union's Venera 1964A and 1964B spacecraft never reached orbit due to rocket failures.
Mariner 2 was the first spacecraft to successfully fly by Venus, at an altitude of 34,773 kilometers (21,607 miles). The spacecraft discovered ground temperatures as high as 428 degrees Celsius (800 degrees Fahrenheit). Other instruments detected no water vapor in the atmosphere or any evidence of a magnetic field around the planet. Radio contact was lost on January 3, 1963.
NASA's Mariner 1 veered off course after launch and had to be destroyed by ground controllers.
The Soviet Union's Venera 1 spacecraft was on its way to Venus when communications with the spacecraft were lost.
The Soviet Union's Sputnik 7 was the world's first Venus mission. The rocket's final stage failed and Sputnik 7 couldn't make the necessary trajectory to carry it on to Venus.