‘Dark’ comets sprouting tails could help solve interstellar mysteries

For almost a decade—ever since 2017, when our first known interstellar visitor, 1I/‘Oumuamua, swooped through the inner solar ...
Scientific American

Astronomers catch a ‘dark’ comet by the tail

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...

Deuterium in comets tells interesting tales

Comets have played an interesting role in the history of astronomy. Since antiquity, many cultures saw them as omens or ...