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dust × 44interstellar-medium × 8
extinction × 6
observational-astronomy × 4
galaxy × 4
astrophysics × 4
light × 3
comets × 3
hubble-telescope × 3
radiation × 3
photometry × 3
identify-this-object × 3
gas × 3
milky-way × 2
star-formation × 2
temperature × 2
meteorite × 2
astrochemistry × 2
infrared × 2
sagittarius-a × 2
zodiacal-light × 2
sombrero-galaxy × 2
betelgeuse × 2
star × 1
the-sun × 1
