Scientists studying archival Galileo spacecraft data have identified ammonia-bearing compounds on Europa for the first time. The ammonia appears along surface cracks, indicating recent transport from the moon’s subsurface ocean. Because ammonia contains nitrogen and degrades quickly under radiation, its presence strengthens Europa’s status as a promising target in…​Scientists studying archival Galileo spacecraft data have identified ammonia-bearing compounds on Europa for the first time. The ammonia appears along surface cracks, indicating recent transport from the moon’s subsurface ocean. Because ammonia contains nitrogen and degrades quickly under radiation, its presence strengthens Europa’s status as a promising target in…  ​ science