| The Messier Catalog | , de Hartmut Frommert |
|---|---|
| The Interactive NGC Catalog Online | , de Hartmut Frommert |
| The Web Nebulae | , de Bill Arnett |
| Astronomy Picture of the Day | , de R. Nemiroff y J. Bonnel |
| Astronomy Program | , de la Universidad de Alabama |
| Hoher List Images | , de Martin Altmann |
| Latest HST images | , de la NASA |
| Photographs from the Anglo-Australian Observatory | , de David Malin |
| Atmospheric Optics | , de Les Cowley |
| "Pretty Pictures" Links |