Yes rock flying through space. That's the actual model. And what about Halley's Comet? How can a comet ever be seen more than once? Wouldn't it just fly by and never be seen again?
Still doesn't make sense how a comet could hold together for thousands of years flying at hundreds of thousands miles an hour. Would fall apart in space before returning to earth
It does make sense as long as Halley's computation is reproducible and predicts quite well the comet's period. Why don't you show your computation to prove your hypothesis?