Archive · 20 Jun 2025
Why Mars Appears Red and How Scientists Study It
Mars is called the "red planet" because it looks reddish, which comes from iron oxide (rust) on its surface.
Ancient people noticed this, even naming it after their god of war.
Probes reveal Mars isn't just red, but more brown and tan in many places.
Its ice caps are white, containing frozen water and carbon dioxide.
Scientists use special cameras to see light that humans can't, like ultraviolet and infrared, providing more details about Mars' surface and atmosphere.
Mars appears reddish due to iron oxide (rust) on its surface.
The name "Mars" comes from the Roman god of war, reflecting its color.
Probes show most of Mars is rusty brown or tan, not purely red.
Mars' ice caps are white and contain frozen water and carbon dioxide.
Scientists use various light spectrums to study Mars beyond visible light.
- Who
- Scientists and astronomers
- What
- The appearance of Mars and the scientific methods used to study it.
- When
- Pictures of Mars were taken in 1976 by the Viking lander and by NASA's MAVEN spacecraft launched in 2013.
- Where
- Mars
- Why
- To understand Mars' formation, atmosphere, and potential for past liquid water.
- Planet Color
- Reddish/Rusty Brown
- Cause of Redness
- Iron Oxide (rust)
- Ice Cap Composition
- Frozen water and carbon dioxide
- First Mars Lander
- Viking lander
- Spacecraft Used
- NASA's MAVEN