A NASA photograph shoes actual blue-colored dunes on Mars.
On April 8, 2021, NASA released a photograph that appeared to show bright, cerulean blue dunes surrounded by the red surface of Mars. The picture can be seen in the tweet posted by Space.com, a space and astronomy news website: Weird 'blue' dunes speckle the surface of Mars in NASA photo https://t.co/Pu7LnCm5Eo pic.twitter.com/QuGQez7gRX - SPACE.com (@SPACEdotcom) April 14, 2021 The picture is beautiful, but it doesn't show the actual colors on the surface of the Red Planet. NASA pointed out that the picture is a 'false color image' that depicts temperature, not color. 'In this false-color image, areas with cooler temperatures are recorded in bluer tints, while warmer features are depicted in yellows and oranges. Thus, the dark, sun-warmed dunes glow with a golden color,' per NASA. Per Space.com, the picture was presented as part of a series marking the 20th anniversary of the Odyssey, the 'longest-working Mars exploration craft in history.' The picture is a 'combination of images taken between December 2002 and November 2004 by the Thermal Emission Imaging System instrument on the Mars Odyssey orbiter.'
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