Columbia subject headings:
Astronomical instruments.
Astronomy--Technique.
Astrophysics--Technique.
Imaging systems in astronomy.
Harvard subject headings:
Astronomical instruments.
Astronomy--Technique.
Astrophysics--Technique.
Imaging systems in astronomy.
Princeton subject headings:
Astronomical instruments.
Astronomy--Technique.
Astrophysics--Technique.
Imaging systems in astronomy.