An article in “The Astrophysical Journal” describes a research group of NGC 5813 made using the NASA’s Chandra X-ray Observatory. In this galaxy group, multiple eruptions originate from the supermassive black hole at the galactic center that gives its name to the group were discovered. This activity took place over about 50 million years and has changed the appearance of the group, creating various cavities, huge bubbles within the cloud of hot gas that surrounds it.
Astronomy / Astrophysics
An article published in the journal “Nature” describes a research that has revealed the size of the outer ring of the planet Saturn. It’s called Phoebe ring because it’s believed to have been created by dust particles coming from Phoebe, one of Saturn’s moons, as a result of impacts that projected them into space. This ring was discovered in 2009 and immediately its enormous size was noted. This new research using infrared images obtained from NASA’s WISE space telescope shows that it’s even larger than previously thought.
ESO’s telescope ALMA (Atacama Large Millimeter / submillimeter Array) in Chile allowed to take the most detailed images ever obtained of a galaxy called HATLAS J090311.6+003906 or SDP.81. It’s about 11.4 billion light years from Earth and its light is distorted by the phenomenon called gravitational lensing. A galaxy between it and the Earth distorts its light with its huge gravity and the result is that we see an almost perfect ring, called an Einstein ring.
An article just published in the journal “Nature” describes a research on Pluto and its moons showing how two of them, Nix and Hydra, spin in an uncontrolled and unpredictable way. This study is based on an analysis of the observations made using the Hubble Space Telescope but because of the considerable distance they’re far from complete. For this reason, it’s possible that the two other small moons of Pluto, Styx and Kerberos, are in the same situation.
The journal “Astronomy and Astrophysics” will publish an article that illustrates a discovery about the atmosphere of the comet 67P/Churyumov-Gerasimenko generated by the sublimation of the ice it contains. Water, but also carbon dioxide, are turned into steam but thanks to the instrument Alice of the space probe Rosetta it was possible to discover that these molecules get broken and that this happens in two stages.