Basically the answer is "Venus".
Mariner 2 flew past Venus.
Pioneer 5 explored the space between Earth and Venus.
The mariner spacecraft explored Mercury, Mars, and Venus. The first successful space probe and first spacecraft visit to a planet was Mariner 2.
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The Mariner 2 spacecraft inspected Venus in late 1962.
Mariner 2 flew past the planet Venus in 1962, becoming the first spacecraft to successfully encounter another planet. It provided valuable information about Venus's atmosphere and surface temperature.
Mariner 2 in 1962. The planet was Venus.
The first mission to explore a planet other than Earth or the Moon was Mariner 2, launched by NASA in 1962. It conducted a flyby of Venus and provided valuable data about the planet's atmosphere and surface temperature.
That statement is incorrect. Mariner 2 was the first spacecraft to successfully fly by and study another planet, Venus, not scan. It provided valuable data on Venus' atmosphere and surface temperature.
The most well-known probe to explore Jupiter is the Juno spacecraft, which has been studying the planet since 2016. Other past probes that have collected data on Jupiter include Pioneer 10, Pioneer 11, Voyager 1, Voyager 2, and Galileo.
None of the Mariners actually landed on Venus. They were "fly-by" missions. Mariner 2 reached Venus in December 1962 and Mariner 5 in 1967. In 1973, Mariner 10 passed Venus and used the planet's gravity to alter its course and continued on to Mercury.
The following spacecraft sucessfully flew to Venus (some did not accomplish their mission goals, or were only fly-bys, but did reach the vicinity of the planet): Sputnik 7 - Venera 1 - Mariner 1 - Sputnik 19 - Mariner 2 - Sputnik 20 - Sputnik 21 - Venera 1964A - Venera 1964B - Cosmos 27 - Zond 1 - Venera 2 - Venera 3, Venera 4 - Mariner 5 - Cosmos 167 - Venera 5 - Venera 6 - Venera 7 - Cosmos 359 - Venera 8 - Cosmos 482 - Mariner 10 - Venera 9 - Venera 10 - Pioneer Venus 1 - Pioneer Venus 2 - Venera 11 - Venera 12 - Venera 13 - Venera 14 - Venera 15 - Venera 16 - Vega 1 - Vega 2 - Galileo - Magellan -Cassini - Venus Express - MESSENGER - Planet-C (Venus Climate Orbiter) (See the related link below)
Voyager 1 and Voyager 2 - the first spacecraft to explore the outer planets of our solar system. Cassini-Huygens - studied Saturn and its moons, providing valuable insight into the planet's composition and atmosphere. Rosetta - successfully landed a probe on a comet, providing valuable data about these icy bodies. New Horizons - provided the first close-up images of Pluto and its moons, revolutionizing our understanding of this distant world. Pioneer 10 and Pioneer 11 - the first spacecraft to explore the outer solar system, providing valuable data on Jupiter and Saturn.
Yes there was, all space crafts that successfully got information from Venus were the Mariner 2, 5 and 10, Venera 4-16, vegal 2, and pioneer Venus 1 and 2