Słownik angielskiego

For volatile materials in extinct comets, heat can be used to melt and vaporize the matrix.

Its orbital elements indicate that may be an extinct comet.

It is now considered likely that within the asteroid population there exist a significant number of dormant or extinct comets.

The fraction of low albedo, "T" 3, objects actually being dormant or extinct comets is estimated to be 65% 10%.

Proponents of the comet hypothesis have suggested that the object was an extinct comet with a stony mantle that allowed it to penetrate the atmosphere.

Don Quixote is suspected to be an extinct comet.

This comet probably represents the transition between typical Halley Family/long period comets and extinct comets.

It may be an extinct comet, and may be the source of some meteor showers.

The impactor may have been an asteroid, comet, centaur, extinct comet, or temporary satellite capture.

P/2007 R5 is probably an extinct comet.