The Philae lander reveals low-strength primitive ice inside cometary boulders

Nature, Published online: 28 October 2020; doi:10.1038/s41586-020-2834-3

When the Philae lander bounced on the surface of comet 67P/Churyumov–Gerasimenko, it exposed primitive icy-dust material within cometary boulders; the intrinsic strength and porosity of this material is reported.

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