Which orbiters initially provided clues resembling coastlines in 1976?
Answer
Viking orbiters
Initial suggestions for the Mars ocean hypothesis arose from images captured by the Viking orbiters in 1976, which displayed features resembling coastlines bordering the northern depression.
Related Questions
What is the ancient Martian ocean sometimes referred to as?Approximately how much lower is the northern hemisphere's elevation compared to the mean planetary elevation?Which orbiters initially provided clues resembling coastlines in 1976?What geophysical mechanism, modeled in 2007, could explain the undulating appearance of ancient Martian shorelines?Which specific Chinese rover provided compelling in situ evidence of buried beach structures?What was the depth range, in meters, where Zhurong's radar detected the dipping reflectors indicative of beaches?What range of inclination angles characterized the dipping reflectors identified by the Zhurong rover?What relative permittivity range found for the buried material effectively rules out lava flows as an origin?What does the presence of sustained net progradation of the shoreline imply about the ancient water body?What is one of the two main pathways scientists agree contributed to the disappearance of Mars's large water reservoir?