At the European Planetary Science Congress going on these days in Nantes, France, evidence were presented that the strange shape of the nucleus of comet 67P/Churyumov-Gerasimenko is due to the fact that it was born from the merger of two small comets occurred a few billion years ago. The study conducted by a team led by Matteo Massironi, a researcher at the University of Padua and Italian INAF (National Institute of Astrophysics) associate, was published in the journal “Nature”.
Astronomy / Astrophysics
Yesterday NASA announced the existence of flows of liquid water on Mars. The study, just published in the journal “Nature Geoscience”, is based upon years of analysis of data collected mainly thanks to the NASA’s MRO (Mars Reconnaissance Orbiter) space probe. The images captured by its camera and spectrometric data allowed to find streams of water along the walls of craters and slopes that vary over time and perchlorate salts in them.
A few hours ago the Astrosat space observatory was launched on a PSLV-XL rocket from the Satish Dhawan Space Centre in the flight listed as PSLV-C30 by ISRO, the Indian space agency. After about 22 minutes Astrosat regularly separated from the rocket’s upper stage to enter an orbit close to the equator at an altitude of about 650 kilometers (about 400 miles). Along with it six satellites were launched for customers of different nations: the Indonesian Lapan-A2 microsatellite, the Canadian NLS-14 (EV9) microsatellite and four USA LEMUR nanosatellites.
An article in the journal “Monthly Notices of the Royal Astronomical Society” describes a study of the galaxy SAGE0536AGN and in particular the supermassive black hole at its center, which is 30 times larger than expected. This is the result of measurements conducted by a team of astronomers at Keele University and the University of Central Lancashire, an anomaly all to explain.
After more than two months since the extraordinary Pluto flyby of NASA’s New Horizons space probe some people might think that the data arrived to Earth are enough to know this dwarf planet comprehensively. Reality keeps on being very different on this small world frozen yet as varied as you would expect from a geologically active planet with an atmosphere that can erode its soil. Here then is the image of a “snakeskin” surface that again leaves scientists puzzled and surprised.