... In the center of 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. ... Astro 1 In Orbit . ... In December of 1990, the Space Shuttle Columbia carried an array of astronomical telescopes high above the Earth's obscuring atmosphere to observe the Universe at ultraviolet and x-ray wavelengths. ... This exceptionally bright fireball meteor trail was photographed with a fish-eye camera at a Czech Republic station of the European Fireball Network on January 21, 1999. ...