Interstellar comet Borisov has an unexpected amount of carbon monoxide

Second visitor from the stars has three times the CO relative to H2O than any local comets

comet 2I/Borisov

A wispy tail of gas and dust trails behind interstellar comet 2I/Borisov, seen about 420 million kilometers from Earth in this Hubble Space Telescope picture from October 12, 2019.


This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Space

From the Nature Index

Paid Content