A Type Ic supernova may be produced by a high - mass star that has blown off much of its outer hydrogen layer while still retaining a significant helium layer, and so it is similar to a Type Ib except that helium is seen in its spectrum. (members.nova.org)
«We characterized the field to estimate the depth of the dynamo region, suggesting that it may occur in a molecular hydrogen layer above the pressure - induced transition to the metallic state.» (sciencedaily.com)
The findings also challenge models of the planet's interior, pointing to a core that is not solid like Earth's, but is instead «fuzzy» and dilutely mingled with an overlying metallic hydrogen layer. (newscientist.com)