Assertion: comet's coma | /r/HasProperty | a cloud of dust and gas
Facets:
Source sentences:
text: Unlike ʻOumuamua, which had an asteroidal appearance, 2I/Borisov's nucleus is surrounded by a coma, a cloud of dust and gas.
text: It lacks a coma, which is the cloud of gas and dust that usually envelops a comet's core, and researchers didn't observe a classic comet tail.
text: The comet is exploding, and its coma, a cloud of gas and dust illuminated by the sun, has become bigger than the planet Jupiter.
text: Unlike ʻOumuamua, which had an asteroidal appearance, 2I/Borisov's nucleus is surrounded by a coma, a cloud of dust and gas.
text: It lacks a coma, which is the cloud of gas and dust that usually envelops a comet's core, and researchers didn't observe a classic comet tail.