On June 2nd, 2003, the European Space Agency’s Mars Express mission left Earth to begin its journey to Mars. Six months later (on December 25th) the spacecraft fired its main engine and entered orbit around Mars. This Christmas will therefore mark the fifteenth anniversary of the orbiter’s arrival and all the observations it has made of the Red Planet since then.
Appropriately, the Mars Express mission was able to commemorate this occasion by capturing some beautiful photos of a Martian crater that remains filled with ice all year round. This feature is known as the Korolev crater, which measures 82 km (51 mi) in diameter and is located in the northern lowlands, just south of the northern polar ice cap.
Continue reading “This Crater on Mars Traps the Cold, and Remains Filled With Ice, All Year Round”
In 2003, scientists from NASA’s Goddard Space Center made the first-ever detection of trace amounts of methane in Mars’ atmosphere, a find which was confirmed a year later by the ESA’s Mars Express orbiter. In December of 2014, the Curiosity rover detected a tenfold spike of methane at the base of Mount Sharp, and later uncovered evidence that Mars has a seasonal methane cycle, where levels peak in the late northern summer.
Since it’s discovery, the existence of methane on Mars has been considered one of the strongest lines of evidence for the existence of past or present life. So it was quite the downer last week (on Dec. 12th) when the science team behind one of the ESA’s ExoMars Trace Gas Orbiter (TGO) spectrometers announced that they had found no traces of methane in Mars’ atmosphere.
Continue reading “Remember the Discovery of Methane in the Martian Atmosphere? Now Scientists Can’t Find any Evidence of it, at all”