... NGC 1850: Gas Clouds and Star Clusters . ... Summer at the South Pole . ... The December solstice brings the beginning of Winter to Earth's Northern Hemisphere and Summer time to the South! ... Simulated Supergiant Star . ... Consider this "star in a box". Of course, the box is actually a computational box consisting of a three dimensional grid of points, and the star is a virtual one whose physical properties and internal dynamics are numerically simulated at the points on the grid. ...