| 05/11/2016 04:10 PM EDT Astronomers have observed the debris field from this explosion − what is now known as Tycho's supernova remnant − using data from NASA's Chandra X-ray Observatory, the NSF's Karl G. Jansky Very Large Array (VLA) and many other telescopes. This e-mail update was generated automatically based on your subscriptions. Some updates may belong to more than one category, resulting in duplicate notices.
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