User:Ashill/Sandbox
Test signature. -Alex (ASHill | talk | contribs) 23:55, 17 July 2008 (UTC)
- Padgett, D. L.; Brandner, W.; Stapelfeldt, K. R.; Strom, S. E.; Terebey, S.; Koerner, D. (1999). "Hubble Space Telescope/NICMOS Imaging of Disks and Envelopes around Very Young Stars". The Astronomical Journal. 117 (3): 1490. arXiv:astro-ph/9902101. Bibcode:1999AJ....117.1490P. doi:10.1086/300781.
- Henry H. Hsieh, David Jewitt (2006-03-23). "A Population of Comets in the Main Asteroid Belt". Science. 312 (5773): 561–563. doi:10.1126/science.1125150. Retrieved 2008-04-05.
- Stefano Coledan (2007-01-01). "Saturn Rings Still A Mystery". Popular Mechanics. Retrieved 2007-03-03.