Two articles published in the journal “Science” describe the discovery of dry ice, meaning frozen carbon dioxide, on the surface of the comet 67P/Churyumov-Gerasimenko. A team of researchers led by Gianrico Filacchione of the Italian National Institute for Astrophysics and another led by Sonia Fornasier the French LESIA-Observatoire de Paris and Université Paris Diderot used the observations conducted with the VIRTIS spectrometer aboard ESA’s Rosetta space probe to find for the first time dry ice on a comet’s nucleus.
Blogs about comets
Two articles to be published in the journal “Astronomy & Astrophysics” describe various aspects of a research on the age of the comet 67P/Churyumov-Gerasimenko. Martin Jutzi and Willy Benz of the University of Bern, Switzerland, together with several colleagues conducted a series of computer simulations to study its two-lobed structure concluding that the collision that gave it its present shape hardly occurred over a billion years ago.
ESA has confirmed that its Rosetta space probe has completed the controlled landing on the comet 67P/Churyumov-Gerasimenko, in the region called Ma’at. This event marks the end of the Rosetta mission because it was not designed for landing, which consequently was violent. Some instruments remained active until the end to send data until it was possible.
An article published in the journal “Monthly Notices of the Royal Astronomical Society” describes a research about the outbursts detected by ESA’s Rosetta space probe on the surface of the comet 67P/Churyumov-Gerasimenko. During the three months around its closest approach to the Sun, on August 13, 2015, Rosetta’s cameras captured 34 outbursts. A team led by Jean-Baptiste Vincent from the Max Planck Institute for Solar System Research in Gottingen, Germany, traced their origin on the comet’s surface.
An article published in the journal “Nature Communications” describes a research about the water on the Moon and concluded that it was brought mostly by asteroids that struck it between 4.5 and 4.3 billion years ago. Until now, scientists generally thought that water was transported by comets but according to the international team led by Jessica Barnes of the British Open University things are different.