NASA’s Stratospheric Observatory for Infrared Astronomy (SOFIA) observed the hyperactive Jupiter-family comet 46P/Wirtanen as it made its closest approach to Earth in December 2018. Now the latest analysis of SOFIA’s data reveals that water in hyperactive comets may share a common origin with Earth’s oceans, reinforcing the idea that comets played a key role in bringing water to our planet billions of years ago. Hubble captured this view of...
