Public domain
What Lies Beneath: Surface Patterns of Glacier-Like Landforms
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
The rotational axis of Mars is currently tilted by about 25 degrees, very similar to that of the Earth (at 23.4 degrees). However, while Earth's axial tilt (also known as "obliquity") tends to change very slightly over time (almost 3 degrees in 40,000 year-cycles), the obliquity of Mars is much more chaotic and varies widely from 0 to almost 60 degrees! The fact that it is currently similar to that of the Earth is merely a coincidence.
NASA Image and Video Library’s own descriptionCredit lineWhat Lies Beneath: Surface Patterns of Glacier-Like Landforms. NASA/JPL, 2016-09-21. Public domain. ID: PIA21065.
