None of the above. It's called a pileus cloud. Pileus clouds form on top of cumulus and cumulonimbus clouds and are usually a ...
Mysterious, city-size 'centaur' comet gets 300 times brighter after quadruple cold-volcanic eruption
The cryovolcanic "centaur" comet 29P/Schwassmann-Wachmann has erupted four times in less than 48 hours, becoming unusually ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback