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- software-tutorials[remove]47
- virtual-observatories47
- astronomy-software2
- brown-dwarfs2
- constellations2
- cosmology2
- distributed-computing2
- open-star-clusters2
- proper-motions2
- abell-clusters1
- andromeda-galaxy1
- asteroids1
- astronomy-databases1
- astrophotography1
- carbon-stars1
- celestial-sphere1
- cepheid-variable-stars1
- classification1
- disk-galaxies1
- galaxies1
