ESA

Blog about ESA activities.

Model of the Earth's magnetic field (Image ESA)

ESA has published the most detailed map ever created of the Earth’s magnetic field using data collected over three years of the mission of its three Swarm satellites. For this work, data collected by the German CHAMP (Challenging minisatellite Payload) mission in the last decade were also used together with new modeling techniques. The result was the extraction of the tiny magnetic signals from the Earth’s crust.

Phases of the collapse at Aswan (Image ESA/Rosetta/NavCam – CC BY-SA IGO 3.0; ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA)

Two articles, one published in the journal “Nature Astronomy” and one published in the journal “Science”, describe two studies about the comet 67P/Churyumov-Gerasimenko. The first is about a cliff Aswan in the Seth region of the comet’s nucleus that crumbled. The second article is about the changes that occurred on the comet’s surface detected thanks to ESA’s Rosetta space probe between the summer of 2014 and September 2016.

Kasei Valles (Photo ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO)

ESA has published new photos of the Kasei Valles channel system on Mars captured by the Mars Express space probe’s High Resolution Stereo Camera (HRSC) instrument. The collected data indicate that Kasei Valles were generated by a series of mega-floods and not by a continuous water flow on the surface. Today this system of channels is one of the largest on Mars and extends for 3,000 kilometers (almost 1,900 miles) from Echus Chasma, near Valles Marineris, up to Chryse Planitia.

Mars north pole (Image ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO)

ESA has published an image of Mars’ northern polar cap. It’s the composition of 32 images captured by the the Mars Express space probe’s High Resolution Stereo Camera (HRSC) instrument during as many passages above Mars’ north pole between 2004 and 2010. That mosaic shows the polar cap’s spiral-shaped troughs.