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The nature of cosmic dust has long been a mystery, but astronomers have identified the source of a lot of dust previously unaccounted for.

<p>An international team of astronomers from China, the United States, Chile, the United Kingdom, Spain, etc., has made a significant discovery by identifying a previously unknown source of dust in the universe: a Type Ia supernova interacting with gas from its surroundings.</p>

A newly discovered nearby supernova whose star ejected up to a full solar mass of material in the year prior to its explosion is challenging the standard theory of stellar evolution. The new observations are giving astronomers new insight into what happens in the final year prior to a star’s death and explosion.

Clue to a 1,000-year-old astrophysical mystery Researchers identify rare electron-capture supernova that may help explain the development of Crab Nebula. August 4, 2021, 8:50 am A color composite of the electron-capture supernova 2018zd (the large white dot on the right) and the host starburst galaxy NGC 2146 (toward the left). Credit: NASA/STScI/J. DePasquale; Las Cumbres Observatory Researchers from Tel Aviv University and the University of Tokyo have identified a rare “electron-capture” supernova, and in the process, may have shed light on an astrophysical mystery dating back nearly 1,...

Housing and Development Newsletter The team found the supernova SN 2018zd had many unusual characteristics, some of which were seen for the first time in a supernova. It helped that the supernova was relatively nearby — only 31 million light-years away — in the galaxy NGC 2146. This allowed the team to examine archival images taken by the Hubble Space Telescope prior to the explosion and to detect the likely progenitor star before it exploded. The observations were consistent with another recently identified SAGB star in the Milky Way, but inconsistent with models of red supergiants, the ...