Where did all the baryons go? We don’t really know where about half of the universe’s “normal” matter is hiding out. Source: space.com Tags: all, Space Like 0 Thanks! You've already liked this 79 views « SpaceX delays launch of its latest batch of Starlink satellites, with two hitchhiking spacecraft » NASA wants a return to the moon in 2024. New human spaceflight chief makes no guarantees. Leave a Reply Cancel replyYou must be logged in to post a comment.