What astronomers thought was a planet beyond our solar system, has now seemingly vanished from sight. Astronomers now suggest that a full-grown planet never existed in the first place. The NASA/ESA Hubble Space Telescope had instead observed an expanding cloud of very fine dust particles caused by a titanic collision between two icy asteroid-sized bodies orbiting the bright star Fomalhaut, about 25 light-years from Earth.
What scientists thought was a planet beyond our solar system has 'vanished.' Though this happens to sci-fi worlds (like Superman's home planet Krypton exploding or the Death Star's attack on Alderaan), scientists seek a plausible explanation. One interpretation: instead of a planet, it could be a dust cloud produced by two large bodies colliding.
What was thought to be an exoplanet in a nearby star system likely never existed in the first place, according to University of Arizona astronomers. Instead, they concluded that the Hubble Space Telescope was looking at an expanding cloud of very fine dust particles from two icy bodies that smashed into each other.
University of California, Irvine astronomers and others have shown that clusters of supernovas can cause the birth of scattered, eccentrically orbiting suns in outer stellar halos, upending commonly held notions of how star systems have formed and evolved over billions of years.
Lancaster physicists working on the T2K major international experiment in Japan are closing in on the mystery of why there is so much matter in the universe, and so little antimatter. The Big Bang should have created equal amounts of matter and antimatter in the early universe. One of the greatest challenges in physics is to determine what happened to the antimatter, or why we see an asymmetry between matter and antimatter.
When the sun expels plasma, the solar wind cools as it expands through space -- but not as much as the laws of physics would predict. UW-Madison physicists now know the reason.
Satellite images from the BRITE mission with the participation of researchers from TU Graz and the Universities of Innsbruck and Vienna document for the first time the complete development of a nova - from eruption to maximum brightness and burn out. The publication has now appeared in the journal Nature Astronomy.
Unparalleled observations of a nova outburst in 2018 by a trio of satellites, including two NASA missions, have captured the first direct evidence that shock waves powered most of the explosion's visible light.
An international team of astronomers from 40 institutes across 17 countries found that shocks cause most the brightness in novae.
An international team of researchers, in a paper published today in Nature Astronomy, highlights a new way novae light up the sky: this is shocks from explosions that create the novae that cause most of the their brightness.