20thcentury 520 adenb aerospaceengineering astrometry astronomers astronomicalinstruments astronomy astrophysics biography ccdcameras congresses dataprocessing designandconstruction etc evolution exploration extraterrestrialenvironment focalplanes formation gammarayastronomy gammaraytelescopes handbooks herschelspaceobservatory(spacecraft) history historyhubblespacetelescope(spacecraft) hubble-weltraumteleskop hubblespacetelescope(spacecraft) imagingsystemsinastronomy infraredastronomy infraredtelescopes instruments jameswebbspacetelescope(spacecraft) largeastronomicaltelescopes maintenanceandrepair manuals marjoriepettit meinel millimeterastronomy observations opticalequipment orbitingastronomicalobservatories planets radioastronomy solaratmosphere spacecraft spaceoptics spacetelescopes spacevehicles stars technologicalinnovations telescopes x-rayastronomy x-raytelescopes