1. Viking 1 (NASA, 1976): The first spacecraft to successfully land on Mars and return images from its surface.
2. Viking 2 (NASA, 1976): Landed on Mars shortly after Viking 1 and conducted similar experiments and observations.
3. Mars Pathfinder (NASA, 1997): Deployed a small rover named Sojourner, which explored the Martian surface and collected data.
4. Mars Exploration Rovers (Spirit and Opportunity) (NASA, 2004): Two rovers that explored the Martian surface for many years, covering great distances and making important scientific discoveries.
5. Curiosity (NASA, 2012): A large and advanced rover that is still currently exploring Mars, studying the planet's geology and searching for signs of past or present life.
6. InSight (NASA, 2018): A stationary lander designed to study the interior structure of Mars, including its crust, mantle, and core.
