"Pathfinder", an American Spacecraft, landed on the planet _______ in 1997.

The correct answer is Mars.

Key Points

• On December 4, 1996, Mars Pathfinder was launched, and on July 4, 1997, it touched down in Ares Vallis on Mars.
• It was created as a technology demonstration for a fresh approach to bringing the first robotic rover and an instrumented lander to the surface of Mars.
• Pathfinder not only succeeded in achieving this objective, but it also returned a record-breaking volume of data and outlasted its initial planned lifespan.
• Both the 23-pound (10.6 kilograms) rover and the lander were outfitted with equipment for making scientific observations and gathering engineering data on the novel technologies being tested. 

Important Points

• Only Mercury is smaller than Mars, which is the fourth planet from the Sun and the second-smallest planet in the Solar System.
• The sole natural satellite of Earth is the Moon. With a diameter that is around one-fourth that of the Earth, it is the fifth-largest satellite in the solar system and the largest and most massive when compared to its parent planet.
• The second planet from the Sun is Venus. It is sometimes referred to as Earth's "twin" or "sister" planet because it is nearly as big and comparable in makeup. Venus, an inner planet to Earth, is always close to the Sun whether it appears in the night or morning sky.
• The largest planet in the Solar System, Jupiter, is the fifth planet from the Sun.