Seasonal Changes in Mars' North Polar Ice Cap

The cap has fully retreated to it's remnant core of water-ice. This residual cap is actually almost cut into two by a large, horn-shaped canyon called Chasma Borealis which is cut deeply into the polar terrain. The HST images also reveal a curious layered terrain which is evidence of past climatic changes on Mars.

The sublimation of all of the carbon dioxide has exposed the ring of dark sand dunes which encircle the North Polar Cap. Outliers of ice persist south of the polar sand sea (between the 3 o'clock and 9 o'clock positions). The bright circular features at 3, 6, and 9 o'clock are ice-filled craters.

Credit:

Phil James (Univ. Toledo), Todd Clancy (Space Science Inst., Boulder, CO), Steve Lee (Univ. Colorado), and NASA/ESA

About the Image

NASA press release
Id:opo9715b2
Type:Observation
Release date:20 May 1997, 19:00
Size:600 x 600 px

About the Object

Name:Mars
Type:• Solar System : Planet
• X - Solar System Images/Videos

Colours & filters

BandWavelengthTelescope
Optical
B
410 nm Hubble Space Telescope
WFPC2
Optical
V
502 nm Hubble Space Telescope
WFPC2
Optical
R
673 nm Hubble Space Telescope
WFPC2

Image Formats

Large JPEG
68.2 KB
Screensize JPEG
101.5 KB

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