Year 2017 was marked by the discovery of the first interstellar asteroid “Oumuamua” and of an exoplanet located around Trappist1. 7 were discovered and 3 would be potentially inhabitable.
Interstellar asteroid “Oumuamua”:
The origin of the object named 1I/2017 U1 (‘Oumuamua) , was confirmed . It is the first asteroid coming from somewhere else observed. The first measures show that it is very long “an extremely unusual form” for an asteroid . Some people wonder if it can include an extraterrestrial probe! Oumuamua has been listened to with a radiotelescope ATA, for approximately sixty hours and the results are negative , as planned.
3 exoplanets of a similar size to the Earth have been discover 40 light-years from us and could be partially inhabitable. Despite this uncertainty , they are worth getting interested in it because they orbit around a little bright star which should allow to look for biosignatures there in a decade. It is, for the moment, our best luck to discover life somewhere else.