Wiktionary
cometlike
a. Resembling or characteristic of a comet.
Usage examples of "cometlike".
They told us of the Shining One rushing through the Veil, cometlike, its hosts streaming behind it, raging with it, in ranks that seemed interminable!
The other half was taken up with the cometlike tail of satellites strung behind the immense freighter.
A small, cometlike object with a fluttering yellow tail was hovering overhead!
The gaseous glowing, dancing tail caused by the Ripper's spirit exciting interstellar plasma as he flees is now almost within reach of Britt's own cometlike spirit.
The evasive maneuver was just in time: a second laser-cannon bolt shot cometlike past the curve of the forward viewport, coming close enough for Boba Fett to feel its heat through the clear transparisteel.