- Direct Project
 - Determining the distances to nearby galaxies. - Galaxiki
- Fictional online galaxy created, maintained, and owned by its community. Membership is free.
- Galaxy Zoo
- Galaxy Zoo is an online, large-scale astronomical survey that asks volunteers to help classify galaxies.
- Groups, Clusters, and Superclusters of Galaxies
- Article offering descriptions and details about clusters and superclusters of galaxies.
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