Comet in Moominland (Swedish: Kometjakten / Mumintrollet på kometjakt / Kometen kommer) is the second in Finnish author Tove Jansson's series of Moomin books.

Back at Moominhouse, the Muskrat, a philosopher whose home was ruined by Moominpappa's bridge-building and who is now staying with them, explains that the pearls depict a comet.

On the way they are attacked by an eagle and Moomintroll finds a gold ring, which Snufkin tells him belongs to the Snork Maiden he had met a few months earlier.

Realising they only have a few days left, they hurry back towards Moominvalley, noticing that the heat from the comet's approach is starting to dry up smaller streams.

Believing the impact to have destroyed everything, they fall asleep, only to discover the next morning, to their great delight, that the comet had missed the Earth altogether and everything is back the way it used to be.

The episodes of the stop-motion series were remastered, re-recorded with a full voice cast, and edited into the 2010 compilation movie Moomins and the Comet Chase.

Some critics have considered the comet an allegory of nuclear weapons,[3] especially in later revisions, while more general fear of war and occupation may have been a major influence on the text of the first edition, written in early summer 1945 before the use of the atomic bombs on Hiroshima and Nagasaki.