5 trends tracked about this subject — the full history, oldest to newest below.
A near-Earth object misidentified as an asteroid for 28 years has been revealed as a "dark comet" after passing within 2 million miles of Earth.
An object tracked as an asteroid since 1998 has been reclassified as a dark comet following an unexplained orbital shift.
5 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
Astronomers report that the interstellar comet 3I/ATLAS may predate the Solar System, exhibiting unique chemical properties during its recent transit.
Astronomer Alan Hale, co-discoverer of the notable Comet Hale-Bopp, has died at age 68.