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.
This NASA photo shows the Hubble Space Telescope in May 2009 as Atlantis astronauts release it into space after its fifth and final overhaul. Hubble launched into space on April 24, 1990 and celebrated its 20th birthday in 2010.Credit: NASA.he Hubble is the first telescope specifically designed to be repaired in space by astronauts, while other space telescopes cannot be serviced at all. NASA scientists estimate that the telescope will only be able to keep taking pictures for five more years.