An artist's representation of 1I/2017 U1 ’Oumuamua. | European Southern Observatory

Interstellar Visitor's Icy Core May Be Coated by Organic Crust From Cosmic Rays

Astronomers studying 1I/2017 U1 ’Oumuamua, the first known interstellar object to visit our solar system, suggest that a crust protects its frozen insides.

This animation shows the path of 1I/2017 U1 ’Oumuamua as it passed through our inner solar system in September and October 2017. From an analysis of its motion, scientists calculate that it originated from outside of our solar system. | NASA/JPL-Caltech