The European Space Agency (ESA) revealed a butterfly-shaped crater on Mars discovered by the Mars Express mission
GS3Economy · S&T · Environment · Security· Space technology (ISRO, missions)· Prelims·
Why in news
The European Space Agency (ESA) revealed a butterfly-shaped crater on Mars discovered by the Mars Express mission, suggesting past liquid water and complex geological history.
Background
The Mars Express mission identified a crater formed by a shallow-angle impact that ejected debris into two lobes. The formation is surrounded by volcanic mesas and wrinkle ridges, indicating a history of impacts, volcanism, and erosion.
Facts for Prelims
- S&TMars Express: An ESA mission currently exploring the Martian surface.
- PlaceMars: The crater was discovered on the planet Mars.
- FactThe crater's 'butterfly' shape was caused by a shallow-angle impact ejecting debris in two lobes.
- S&TWrinkle ridges and volcanic mesas: Geological features identified on Mars surrounding the crater.
For Mains
Q. Discuss how the exploration of Martian geological features contributes to our understanding of planetary evolution and the potential for past habitability.
Dimensions to cover in your answer
- Geological interplay: Understanding the combined effects of impact events, volcanic activity, and erosion on planetary surfaces.
- Astrobiological significance: Using crater-induced melting of subsurface ice as a proxy for past liquid water presence.
Keywords: Planetary Geology · Mars Express · Astrobiology · Impact Cratering · Volcanism
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