Astronomy / Astrophysics

Supernova in the galaxy M82 captured by the Swift satellite. Mid-ultraviolet light is shown in blue, near-UV light in green and visible light in red (Image NASA/Swift/P. Brown, TAMU)

A research conducted by a team led by astronomer Peter A. Milne of the University of Arizona published in two articles in the “Astrophysical Journal” shows that Type Ia supernovae can be divided into two groups with different characteristics. For years, astronomers had thought that their brightness depended almost exclusively on their distance. This can have consequences on our knowledge of the universe expansion, also calculated based on this type of supernovae.

Artistic representation of the impact of Theia with the primordial Earth (Image NASA/JPL-Caltech)

Research on the origin of the Moon agree more and more on the giant impact hypothesis. According to this theory, about 150 million years after the birth of the solar system, the early Earth was hit by a planet the size of Mars. This caused the expulsion of a huge amount of debris that formed the Moon. Doubts still exist concerning the composition of the Earth and the Moon but two research just published in the journal “Nature” add new information about the giant impact hypothesis.

NASA is studying the presence of water in the solar system and beyond also in connection with the search for alien life form (Image NASA)

Yesterday in Washington, D.C. there was a NASA panel about water and its connection with the possibility of finding extraterrestrial life. Some scientists summarized the findings of recent decades obout the presence of water in space and exoplanets. According to Ellen Stofan, chief scientist at NASA, in the course of our life we ​​may finally have an answer whether we are alone in the solar system and beyond.

Images of eight galaxies containing green filaments that are the last effect of ancient quasars (Image NASA, ESA, and W. Keel (University of Alabama, Tuscaloosa))

The Hubble Space Telescope photographed a series of ghosts of quasars that existed in the past. They are seen as ethereal green objects in various forms and are the last effects of ancient quasars. These phenomena are very interesting from a scientific standpoint because they can provide information about the past of those galaxies, which were once very active.