keywords: telescope geode geodes hubble celestial
text: Hubble Peers Inside a Celestial Geode Hubble Space Telescope -- In this unusual image, NASA's Hubble Space Telescope captures a rare view of the celestial equivalent of a geode  a gas cavity carved by the stellar wind and intense ultraviolet radiation from a hot young star.    Real geodes are baseball-sized, hollow rocks that start out as bubbles in volcanic or sedimentary rock...