Pulsars - small, dark, extremely dense stars that spin and emit a beam of radio waves like a cosmic lighthouse - might be far older than we think, says Philip Ball.
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References
Gaensler,B. M. & Frail, D. A. A large age for the pulsar B1757-24 from an upper limit on its proper motion. Nature, 406, 158 - 160 2000.
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Ball, P. Some stars may be older than they look. Nature (2000). https://doi.org/10.1038/news000713-8
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DOI: https://doi.org/10.1038/news000713-8
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