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.
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.
A combined use of the Hubble and Chandra space telescopes allowed to conduct a study of dark matter and the results were described in an article published in the journal “Science”. Currently we have no instruments to directly detect dark matter so scientists have to study it indirectly through its effects, in this case on 72 galaxy clusters to study their behavior.
In the journal “Science” an article was just published that discusses a research conducted by an international team of scientists who found evidence that supernovae can generate a sufficient amount of material that can later create new planets like Earth. This team, led by Ryan Lau of Cornell University in Ithaca, New York, studied in particular a supernova that exploded about 10,000 years ago using a special instrument, the airborne telescope SOFIA.
The Hubble Space Telescope has been used to study Ganymede, the largest Jupiter’s moon, and in particular its aurorae. Analyzing their characteristics, it was possible to get the best clues found so far of the existence of a Ganymede underground ocean of liquid salt water. This ocean may contain more water than it exists on the surface of the Earth.