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Today's, "Astronomy Picture of the Day" is quite something. it appears a meteor or "something" punctured a hole into the planet Mars' dead volcano 'Pavonis Mons'.
This is an amazing photo that just begs for a World space agency to send a rover with the capability's of launching a drone of some sort to fly in and check out what lies beneath the surface of this one of the most intriguing planets in our Solar System!
From the description accompanying the photo: "Explanation: What created this unusual hole in Mars? The hole was discovered by chance in 2011 on images of the dusty slopes of Mars' Pavonis Mons volcano taken by the HiRISE instrument aboard the robotic Mars Reconnaissance Orbiter currently circling Mars. The hole appears to be an opening to an underground cavern, partly illuminated on the image right. Analysis of this and follow-up images revealed the opening to be about 35 meters across, while the interior shadow angle indicates that the underlying cavern is roughly 20 meters deep. Why there is a circular crater surrounding this hole remains a topic of speculation, as is the full extent of the underlying cavern. Holes such as this are of particular interest because their interior caves are relatively protected from the harsh surface of Mars, making them relatively good candidates to contain Martian life. These pits are therefore prime targets for possible future spacecraft, robots, and even human interplanetary explorers. "
The photo was too large to post, so here's the link to this stunning photo: http://apod.nasa.gov/apod/ap140309.html?utm_content=buffer37d45&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer
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