Although the supernova itself is a million times fainter than 17 years ago, a new light show in the space surrounding it is just beginning. "We see the shock happening everywhere around the ring." In spring of 1997 the newly installed Space Telescope Imaging Spectrograph (STIS) first measured the speed of the supernova debris pushing along the shock wave. Chapter 5 Spherical Blastwaves & Supernova Remnants One way to create a shock is to inject a very large amount of energy into a very small volume. An outwardly expanding shock wave is generated, with matter reaching velocities on the order of 5,000–20,000 km/s, or roughly 3% of the speed of light. This happens in the interstellar medium whenever a supernova goes off. This supernova shock wave slammed into its companion star Fast followup allowed astronomers to see the cause of the explosion. Suppose an explosion instantaneously injects an amount of energy E into an ambient medium of uniform density ρ1. Avec la musique en streaming sur Deezer, découvrez plus de 56 millions de titres, créez gratuitement vos propres playlists, explorez des genres différents et partagez vos titres préférés avec vos amis. The shock wave caused by the supernova explosion expands, having a strong impact on the composition and physical state of surrounding interstellar materials. There is also a significant increase in luminosity, reaching an absolute magnitude of −19.3 (or 5 billion times brighter than the Sun), with little variation. SN 2020hvf was discovered in the 14th-magnitude galaxy NGC 3643 in southern Leo on April 21st by the ATLAS Project, the same group that successfully spotted two comets in the spring sky.Located 21.9″ east and 2.7″ north of the galactic nucleus, the supernova was initially faint — only magnitude 15.5. "The STIS lets you see the invisible stuff," says George Sonneborn of Goddard Space Flight Center in Greenbelt, MD. Data from Chandra have provided the first X-ray evidence of a supernova shock wave breaking through a cocoon of gas surrounding the star that exploded in SN 2010jl. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way. By Alison Klesman | Published: Tuesday, August 15, 2017 X-ray: NASA/CXC/Royal Military College of Canada/P.Chandra et al); Optical: NASA/STScI Écoutez Shockwave Supernova par Joe Satriani sur Deezer. This discovery may help astronomers understand why some supernovas are much more powerful than others. Called SN 1987A, the titanic supernova explosion blazed with the power of 100,000,000 suns for several months following its discovery on Feb. 23, 1987.

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