The Voyager 2 went to Neptune on it's last stop in the solar system.
Unmanned space probes have been sent to various destinations in our solar system, including Mars, Venus, Mercury, Jupiter, Saturn, Uranus, Neptune, and Pluto. They have also traveled beyond our solar system to study interstellar space.
Space probes have been sent to Neptune to study the planet's atmosphere, rings, and moons, and to gather data that can help us better understand the outer solar system and its formation. The information collected from these missions can also provide insights into the composition and behavior of other gas giants in our galaxy.
Only one spacecraft has visited Neptune: NASA's Voyager 2 probe, which made a flyby of the planet in August 1989. Voyager 2 provided our first close-up images and scientific data of Neptune and its moons.
The answer depends on "before what".
At current we have sent, or are sending, probes to all of the planets in our solar system. The probe Voyager has visited several planets, including Jupiter and Neptune, while Cassini is currently in orbit around Saturn.
They have sent 6 space prbes to Jupiter.
there has been 16 probes that had been sent to venus.
The only probe that has reached Neptune so far was Voyager 2.
Voyager 2 passed by Neptune on August 23, 2009
The US sent the Voyager probes, Viking probes, and New Horizons probe to explore space, while the USSR sent the Venera probes, Luna probes, and the Mars probes. These space probes played crucial roles in advancing our understanding of the solar system and beyond.
Superman
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