Astra Lost in Space, Vol. 1 by Kenta Shinohara

[Viz] Can eight teenagers find their way home from 5,000 light-years away? It’s the year 2063, and interstellar space travel has become the norm. Eight students from Caird High School and one child set out on a routine planet camp excursion. While there, the students are mysteriously transported 5,000 light-years away to the middle of nowhere! Will they ever make it back home?! It's the first day of Planet Camp, and Aries Spring couldn't be more excited! She, along with eight other strangers, leave for Planet McPa for a weeklong excursion. Soon after they arrive, however, a mysterious orb appears and transports them into the depths of space, where they find an empty floating spaceship…