«The research reactor has the most compact core of any reactor and burns highly enriched uranium. (ornl.gov)
Swirling motions in clouds of cold, dense gas have given, for the first time, an active insight into how gravity creates the compact cores from which stars form in the interstellar medium. (sciencedaily.com)
For starters, measurements of Jupiter's gravity, determined from the tug of the planet on the spacecraft, suggest that the planet doesn't have a solid, compact core, Bolton and colleagues report in one of the new papers. (sciencenews.org)