In some series, as the methane series, the higher members are solids.
Only two of them, methane and acetylene, will be discussed here.
It could insinuate itself into places where neither the methane nor the ammonia could get.
Two of the planets were enveloped in methane, but the third had an earth-normal atmosphere.
It consists of a number of saturated hydrocarbons of the methane series.
All we need trouble about, however, is the first two, Methane and Ethane.
We have pictured to ourselves the molecule of methane: let us do the same with ethane.
These would be large planets rich in hydrogen, ammonia and methane.
The explosion of methane stirs up the dust, which then explodes.
As methane is not self-inflammable there remains the difficulty of explaining how it becomes lighted.