Topic
020102 - Astronomical and Space Instrumentation
9
970102 - Expanding Knowledge in the Physical Sciences
6
020104 - Galactic Astronomy
4
Antarctica
2
XXXXXX - Unknown
2
0201 - Astronomical and Space Sciences
1
aurora
1
aurorae
1
cloud cover
1
galaxies
1
infrared telescopes
1
interferometers
1
optical observations
1
site testing instruments
1
sky
1
sky brightness
1
spectrum analysis
1
surveys
1
winter
1