Oumuamua

A strange class of 'dark' comets with sprouting tails may explain the mysterious behavior of 'Oumuamua, the first known interstellar object, and provide insights into how Earth became habitable.

Scientists traced interstellar comet 3I/Atlas to a cold, isolated region of the Milky Way, suggesting it formed in a pre-solar system environment. The comet, estimated at 11 billion years old, exhibits high deuterium levels in its water, indicating origins in a colder, less heated stellar nursery. The University of Michigan-led study used the ALMA observatory and Hubble Space Telescope for analysis.