Some lists keep the "C" prefix for comets of with orbits longer than about 30 years until their return is confirmed.

He began systematic searches for comets in that year.

Gavin, how did you happen to be looking for comets at the right time and place?

He said he used it to search for comets.

It has an atypical chemical makeup for comets in the Solar system.

I've had two of the scopes looking for comets also.

Such surveys are undertaken to look for comets and asteroids as well as exploding stars.

It wasn't too different from looking for comets: You remember what things ought to look like, and search for anything different.

For most comets, the perihelion of their orbit lies outside the Earth's orbit.

You can learn where to look for comets and maybe even discover one yourself.