Astra Lost in Space (彼方のアストラ) is a sci-fi manga by Kenta Shinohara. It is serialized in the online magazine Shonen Jump+, and started its serialization May 9, 2016. Viz Media has licensed it and publishes the chapters online.
In the year 2063, technology has rapidly advanced allowing for space travel to become commonplace. Eight students from Caird High School and one child set out for a routine space camp on a nearby planet, only to be warped 5,000 light years away by a mysterious object. With no way to call for help, the nine children, aboard an abandoned spaceship they dub the Astra, slowly make their way home. Along the way, they attempt to unravel the mystery behind their transportation.