By combining the Chandra data with 30 years worth of observations, scientists have made a movie of the evolution of Tycho’s supernova remnant. When the star that created this supernova remnant exploded in 1572, it was so bright that it was visible during the day. In modern times, 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. Today, they know that the Tycho remnant was created by the explosion of a white dwarf star, making it part of the so-called Type Ia class of supernovas used to track the expansion of the Universe. ...
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