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star-cluster × 43globular-clusters × 11
star × 9
galaxy × 5
astrophysics × 4
data-analysis × 4
observational-astronomy × 3
distances × 3
gaia × 3
history × 2
dark-matter × 2
tidal-forces × 2
newtonian-gravity × 2
stellar-dynamics × 2
hr-diagram × 2
the-sun × 1
gravity × 1
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photography × 1
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