NASA solves a 2,000-year-old supernova mystery hidden inside a massive cosmic bubble |
The ‘guest star’ of 185 AD has been one of astronomy’s most unresolved cases for over 1800 years. Ancient Chinese chroniclers recorded a mysterious light that lasted eight months, but an examination of the debris field created (RCW 86) has shown that the debris remains too substantial in size compared to the time elapsed. However,…
