Artistic illustration of the planet GJ 436b surrounded by its huge tail and its parent star GJ 436 (Image NASA, ESA, and G. Bacon (STScI))

An article in the journal “Nature” describes a research about the planet GJ 436b, whose mass is similar to that of Neptune. Using the Hubble Space Telescope, a team of astronomers led by David Ehrenreich of the Observatory of the University of Geneva in Switzerland discovered that it leaves behind a huge tail of the estimated size of about 50 times that of the star it orbits. Those are hydrogen emissions ripped from the planet which make it looke like a huge comet.

Artistic impression of the galaxy CR7 (Image ESO/M. Kornmesser)

An article accepted for publication in “The Astrophysical Journal” describes the discovery of a galaxy called CR7 seen as it was at the time of the early universe in which first-generation stars were found. This research was carried out mainly using ESO’s Very Large Telescope but data collected by the W. M. Keck Observatory, the Subaru Telescope and the Hubble Space Telescope were also used.

Galaxies containing quasars observed using the Hubble Space Telescope: in the top row the quasars are visible, in the bottom row the quasars' light is subtracted (Image NASA/ESA)

An article in the journal “Astrophysical Journal” describes a research conducted on quasars using the Hubble Space Telescope. These objects that are incredibly bright were observed in their formation phase, when they were in a sense teen-agers. The observations confirm the hypothesis that quasars are generated by galactic collisions that feed the supermassive black hole at their center.

Photo taken by the LightSail's on-board camera showing part of its solar sail (Photo The Planetary Society)

The Planetary Society declared the success of the mission to test the LightSail solar sail. Started on May 20, 2015 as a secondary payload in the launch of the military shuttle X-37B, the CubeSat-class nanosatellite that contained the solar sail has overcome various problems. Eventually the onboard systems have been tested collecting a lot of data useful for the complete mission scheduled for 2016. A few days ago, the LightSail prototype fell back into the atmosphere, disintegrating.