iPTF14hls

iPTF14hls

iPTF14hls ​grew ​bright ​and ​dim ​again ​at ​least ​five ​times ​over ​two ​years. ​This ​behavior ​has ​never ​been seen ​in ​previous ​supernovae, ​which ​typically ​remain ​bright ​for approximately 100 days and ​then fade. Adapted from Arcavi et ​al. 2017, ​Nature.

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