The oceans between stars

"Liam and Phoebe, having barely escaped our exploding sun with their lives, are in stasis for the decade-long journey to the rogue planet Delphi, where they hope to meet up with the rest of the human refugees, find help for their injured parents, and pass along the devastating things they discovered on Mars: that someone destroyed their world intentionally, and that that someone might still be after them, trying to finish the job."--OCLC.