Subject
- photometry, ubvri2
- planets2
- positional data2
- qsos2
- radio absorption2
- radio antennas2
- radio astrometry2
- radio interferometers2
- radio interferometry2
- radio observatories2
- radio spectra2
- radio spectrographs2
- radio spectrometers2
- radio telescopes2
- space astronomy2
- space telescopes2
- spectra, optical2
- spire sources2
- stars, giant2
- stars, masses2
