Oumuamua: scientists finally decide on real identity of mysterious interstellar object
6 years, 9 months ago

Oumuamua: scientists finally decide on real identity of mysterious interstellar object

The Independent  

Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy After months of speculation about the identity of Oumuamua, or the first “alien” object from outside our solar system, scientists have come to a conclusion about what it is. The space rock first identified by astronomers in November, has been variously described as an asteroid, a new variety of “interstellar object” and even an alien spacecraft. “From theoretical models we were expecting interstellar objects to be mostly cometary, on the basis of the region of the planetary systems where they form,” said Dr Marco Micheli from the European Space Agency “However, Oumuamua did not look as a comet in optical images we obtained, since it did not have a coma or a tail. “Our paper presents the detection of a weak non-gravitational acceleration acting on Oumuamua, which we could explain with a weak emission of material from the object, as comets typically do,” said Dr Micheli.

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