... formation of nucleotides, the building blocks of RNA and DNA, can form much more easily if reduced gases I.e. a hydrogen rich one, are present than if they are not, say the authors. Accordingly, “an H2-dominated atmosphere with its...
... (< 10 Myr) and much more massive and hydrogen rich protoplanetary disks which provided the blanket of material to...-Neptunes or more massive planets that already have substantial hydrogen-rich atmospheres, the late disk accretion is likely to mix...
... out of nuclear fuel, they explode as the peculiar, hydrogen-free type Ib and Ic supernovae, and may cause long... evolution, smaller-mass stars ignite helium deep within their hydrogen-rich envelope. If this envelope is removed by binary interactions ...
... a reminder of this almighty explosion is reignited as the blasted off gaseous remains of the nova slam into nearby hydrogen-rich gas and it temporarily gets bright again. If this does happen, then astronomers can identify the interaction...