A Blue Edge Around 3I/ATLAS Hints at Fleeting Icy Grains
A faint blue shift in 3I/ATLAS’s outer coma may reveal short-lived icy grains—and a hidden phase in an interstellar comet’s journey.
interstellar comet
A faint blue shift in 3I/ATLAS’s outer coma may reveal short-lived icy grains—and a hidden phase in an interstellar comet’s journey.