Meteorology. a line drawn on a weather map or chart that connects points at which the barometric pressure is the same. Also, isobare [ahy-suh-bair] /ËaÉª sÉËbÉÉr/ (Show IPA). Physics, Chemistry. one of two or more atoms having equal atomic weights but different atomic numbers.
Hubble Essentials. With the Hubble Space Telescope on board, Discovery begins its roll maneuver after liftoff from Kennedy Space Center on April 24, 1990. This low-angle view of the launch shows the shuttle atop the external tank, flanked by two solid rocket boosters, as it rises into the sky.
Date: May 11-24, 2009. The Hubble Space Telescope was reborn with Servicing Mission 4 (SM4), the fifth and final servicing of the orbiting observatory. During SM4, two new scientific instruments were installed â the Cosmic Origins Spectrograph (COS) and Wide Field Camera 3 (WFC3).TS-125 was Grunsfeld's fourth mission and his third trip to the Hubble Space Telescope. Grunsfeld had flown three times previously, STS-67 in 1995, and Hubble missions STS-81 in 1997, and STS-103 in 1999.