... Solar-type stars are now inferred to harbor planets of approximately Jupiter mass - some residing in temperature zones which could conceivably support liquid water and therefore life! In the Center of 30 Doradus . ... In the center of 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. ... Comet Halley and the Milky Way . ... Comet Halley is the bright white streak near this photograph's center. ... Maria Mitchell Inspires a Generation . ... Half Dome Rock on Mars . ...