MAY 14, 2015 9:14 PM PDT

Mars Might Be a Red Planet, But its Sunset Color Might Surprise You

WRITTEN BY: Jennifer Ellis
NASA's Curiosity Rover has been exploring the lands of Mars for over two-and-a-half years. Also known as the ‘Red Planet,' Mars is the fourth planet from the sun in our solar system right behind our very own planet Earth.

During a normal sunny day here on Earth, we typically see a beautiful blue sky when the skies are clear. If you were to step outside on Mars at the same time of the day in the same conditions, you would see an orange sky that much resembles the ‘red' color of the planet from outer space.


Interestingly, when the Sun begins to set in the evening, both Earth and Mars appear to trade shoes. When the Sun begins to set on Earth, we develop Mars-like sky qualities that are orange in color, and as it would appear from recent images taken by NASA, when the Sun begins to set on Mars, the Red Planet starts to develop Earth-like sky qualities that are blue in color.

The images sent over by NASA's Curiosity Rover after a day of watching the skies on April 15th, 2015 show the beautiful blue hue given off by a Martian sunset:

Not only does the Sun itself give off a blue light in the picture, the entire surrounding atmosphere around the Sun also gives off blue hues when struck by the Sun's light.

So what causes this to happen? - As NASA's Mark Lemmon explains, the composition of the atmosphere on Mars is different from that of the atmosphere here on Earth in that Mars has dust in the atmosphere that reacts with the incoming sunlight to produce a blue effect on the sky.

"The colors come from the fact that the very fine dust is the right size so that blue light penetrates the atmosphere slightly more efficiently. When the blue light scatters off the dust, it stays closer to the direction of the sun than light of other colors does. The rest of the sky is yellow to orange, as yellow and red light scatter all over the sky instead of being absorbed or staying close to the sun."

NASA does note that the images were taken in between some heavy dust storms, which helped increase the amount of dust in the skies at the particular time of the sky-watching event and amplified the effects of the blue sunset. Nonetheless, it's a surprising outcome for a planet that has been labeled the "Red Planet."

Written by Anthony Bouchard
About the Author
  • I love all things science and am passionate about bringing science to the public through writing. With an M.S. in Genetics and experience in cancer research, marketing and technical writing, it is a pleasure to share the latest trends and findings in science on LabRoots.
You May Also Like
MAY 04, 2020
Space & Astronomy
The Science Behind Brown Dwarfs
MAY 04, 2020
The Science Behind Brown Dwarfs
Outer space is chock-full of stars and planets orbiting them, but there’s a fine line between what makes a star a ...
MAY 10, 2020
Space & Astronomy
What Exactly Are Star Clusters?
MAY 10, 2020
What Exactly Are Star Clusters?
When you think of stellar systems, you might be inclined to think of a system like our own with just one star, or perhap ...
JUN 14, 2020
Chemistry & Physics
Why Are There So Few Black People in STEM?
JUN 14, 2020
Why Are There So Few Black People in STEM?
On June 10th, 2020, thousands of STEM scientists and organizations around the world went on strike to protest systemic r ...
JUN 26, 2020
Space & Astronomy
Astrophysicists Find Evidence of Nearby Planet that May Sustain Life
JUN 26, 2020
Astrophysicists Find Evidence of Nearby Planet that May Sustain Life
Researchers have found that a nearby red dwarf star, known as Gliese 887, may host three planets, one of which could sus ...
AUG 12, 2020
Space & Astronomy
Earthlike Planets May Orbit Supermassive Black Holes
AUG 12, 2020
Earthlike Planets May Orbit Supermassive Black Holes
Supermassive black holes are enormous wells of gravity that bind galaxies together and emit bright X-ray beams. Known to ...
SEP 07, 2020
Space & Astronomy
Earth's Atmosphere Causes Moon to Rust
SEP 07, 2020
Earth's Atmosphere Causes Moon to Rust
Researchers from the University of Hawaii have noticed that the Moon is turning slightly red or 'rusty'- and tha ...
Loading Comments...