Breaking space news, the latest updates on rocket launches, skywatching events and more! You are now subscribed Your newsletter sign-up was successful Want to add more newsletters? NASA has used advanced imaging techniques to peer inside samples of an asteroid, discovering extensive networks of cracks running throughout the rock particles. One theory to explain this feature of Bennu was that the object might be more porous than telescopic observations of its boulder-strewn surface suggested. However, scientists needed a detailed analysis of the asteroid samples to confirm this theory — and that's what they just got. "It turns out that they're really cracked too, and that was the missing piece of the puzzle," said Andrew Ryan, who led the OSIRIS-REx sample physical and thermal analysis working group, in a NASA statement. These images offer a rare look inside a piece of the early solar system.…