1.   And orbiting observatories, most notably the Hubble Space Telescope, have opened the universe with a clarity astronomers of the past could only dream of.

2.   A family of focusers based on concentric cylindrical mirrors that offer curved, glancing surfaces to incident beams are used as X-ray telescopes in orbiting X-ray observatories.

3.   Three major orbiting observatories, including the Hubble Space Telescope will participate as well.

4.   Extremely powerful bursts of gamma rays that are exploding across the heavens almost daily remain a puzzle to astronomers despite four years of observation by an orbiting NASA observatory.

5.   Space shuttle Columbia captured the Hubble Space Telescope early Sunday in preparation for a tuneup the crew will give the orbiting observatory.

6.   The gamma ray burst was detected Saturday morning by two orbiting observatories.