Calcite with quartz from Huanggang Mine, Inner Mongolia, China. The pictured specimen is tall. The quartz at the center of the stacked calcite disks is better exposed in some of the specimens that they have at the show. Photo credit: Jeffrey A.
Star Cluster Pismis NGC Pismis 24 hangs over NGC a nebula about 8000 ly away in Scorpius. This picture showed that the brightest star in the cluster is in fact two stars in a tight binary orbit. Each star is about 100 times the Sun's mass.