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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: 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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