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New observations suggest that certain extremely bright supernovae are not the nuclear explosions of very massive stars. Instead, they may be ordinary-mass events lit up by a potent central

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AFFILIATIONS * Daniel Kasen is in the Departments of Physics and Astronomy, and in the Nuclear Science Division, University of California, Berkeley, Lawrence Berkeley National Laboratory,

Berkeley, California 94720, USA., Daniel Kasen Authors * Daniel Kasen View author publications You can also search for this author inPubMed Google Scholar CORRESPONDING AUTHOR Correspondence

to Daniel Kasen. RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Kasen, D. Super-luminous supernovae on the rise. _Nature_ 502, 310–312 (2013).

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