NASA has confirmed that a few hours ago the Messenger (MErcury Surface, Space ENvironment, GEochemistry and Ranging) space probe ended its mission by crashing on the surface of the planet Mercury. Messenger ran out of fuel and some maneuvers were recently programmed to prolong its life of a few more days. Eventually, even the helium normally used to pressurize the propellant was released in a jet that gave the probe one last push. It was a very successful mission that allowed us to discover many things about Mercury.
Roscosmos, the Russian space agency, has officially given up hope of taking control of the Progress M-27M spacecraft. The attempts to contact it made on Tuesday and Wednesday had no success. Yesterday the docking to the ISS was called off and then the cargo spacecraft has been declared lost. The consequence is that it will fall into the atmosphere with no control disintegrating with all supplies it’s carrying.
An article published in “Astrophysical Journal” describes the diskovery made by a group of astronomers led by Sayan Chakraborti of the Harvard-Smithsonian Center for Astrophysics (CfA). They studied a supernova called 2012ap (SN 2012ap) which is a missing link between ordinary ones and the ones that cause the emission of a gamma-ray burst.
There are several known cases of runaway stars such as Zeta Ophiuchi but now the Russian astronomers Igor Chilingarian and Ivan Zolotukhin of the Moscow State University’s Sternberg Astronomical Institute have found runaway galaxies. In an article published in the journal “Science”, the list 11 galaxies ejected from the clusters they used to be part of because of the gravitational interaction with their neighbors.
A team of astronomers used the HARPS (High Accuracy Radial velocity Planet Searcher) instrument at ESO’s La Silla Observatory in Chile to obtain for the first time a direct detection of the spectrum of visible light from an exoplanet. It’s 51 Pegasi b, already well known by astronomers because it was the first exoplanet discovered among those orbiting a star on the main sequence.