Hi folks, Had an idea for a science fiction story I'm writing, wondered if it would actually work in reality. Basically, if a comet's nucleus were comprised of concentric layers of ice and dust, would it produce a coma/tail in an on-and-off manner? Would it outgas and stop, outgas and stop as the materials exposed to the sun cycled? I am an astronomy buff, not an astronomer, and I am very aware of the difference. With that in mind, I thought I'd check before I put it to paper.