"Visual horizons in world models", Rindler, W., 1956, MNRAS, 116, 662 http://adsabs.harvard.edu/abs/1956MNRAS.116..662R
"Synthesis of the Elements in Stars", Burbidge, E. Margaret, Burbidge, G. R., Fowler, William A., & Hoyle, F., 1957) Reviews of Modern Physics, 29, 547 http://adsabs.harvard.edu/abs/1957RvMP...29..547B VERY LONG!
"On the possibility of determining Hubble's parameter and the masses of galaxies from the gravitational lens effect", Refsdal, S., (1964) Monthly Notices of the Royal Astronomical Society, 128, 307 http://adsabs.harvard.edu/abs/1964MNRAS.128..307R DONE
"Fermat's principle, caustics, and the classification of gravitational lens images", Blandford, Roger & Narayan, Ramesh, (1986) Astrophysical Journal, 310, 568 http://adsabs.harvard.edu/abs/1986ApJ...310..568B
"Structure in the COBE differential microwave radiometer first-year maps", Smoot, G. F., Bennett, C. L., Kogut, A., Wright, E. L., Aymon, J., Boggess, N. W., Cheng, E. S., de Amici, G., Gulkis, S., Hauser, M. G., Hinshaw, G., Jackson, P. D., Janssen, M., Kaita, E., Kelsall, T., Keegstra, P., Lineweaver, C., Loewenstein, K., Lubin, P., Mather, J., Meyer, S. S., Moseley, S. H., Murdock, T., Rokke, L., Silverberg, R. F., Tenorio, L., Weiss, R., & Wilkinson, D. T., (1992) Astrophysical Journal, 396, L1 http://adsabs.harvard.edu/abs/1992ApJ...396L...1S
"The Baryon Content of Galaxy Clusters - a Challenge to Cosmological Orthodoxy", White, S. D. M., Navarro, J. F., Evrard, A. E., & Frenk, C. S., (1993) Nature, 366, 429 http://adsabs.harvard.edu/abs/1993Natur.366..429W DONE
"Core condensation in heavy halos - A two-stage theory for galaxy formation and clustering", White, S. D. M. & Rees, M. J., (1978) Monthly Notices of the Royal Astronomical Society, 183, 341 http://adsabs.harvard.edu/abs/1978MNRAS.183..341W
"Ghostly streams from the formation of the Galaxy's halo", Lynden-Bell, D. & Lynden-Bell, R. M., (1995) Monthly Notices of the Royal Astronomical Society, 275, 429 http://adsabs.harvard.edu/abs/1995MNRAS.275..429L
"On the Masses of Nebulae and of Clusters of Nebulae", Zwicky, F., (1937) Astrophysical Journal, 86, 217 http://adsabs.harvard.edu/abs/1937ApJ....86..217Z
"3C 273 : A Star-Like Object with Large Red-Shift", Schmidt, M., (1963) Nature, 197, 1040 http://adsabs.harvard.edu/abs/1963Natur.197.1040S
"Black holes in binary systems. Observational appearance", Shakura, N. I.; Syunyaev, R. A., 1973, A&A, 24, 337 http://adsabs.harvard.edu/abs/1973A%26A....24..337S DONE
\\ arXiv:0902.1039 Date: Fri, 6 Feb 2009 09:51:02 GMT (421kb) "Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue", Floor van Leeuwen, 2009, Accepted for publication by A&A, arXiv:0902.1039 http://adsabs.harvard.edu/abs/2009arXiv0902.1039V Really to discuss the long running issues to do with the distance to local star clusters.
"Lens-like action of a star by the deviation of light in the gravitational field", Einstein, (1936) Science 84, 506-507 http://adsabs.harvard.edu/abs/1936Sci....84..506E
"Apparent luminosities in a locally inhomogeneous universe" Weinberg (1976), ApJL, 208, 1 http://adsabs.harvard.edu/abs/1976ApJ...208L...1W
"Hydromagnetic flows from accretion discs and the production of radio jets", Blandford & Payne (1982), MNRAS, 199, 883 http://adsabs.harvard.edu/abs/1982MNRAS.199..883B
"The Structure of Cold Dark Matter Halos" Navarro, Frenk & White (1996), ApJ, 462, 563 http://adsabs.harvard.edu/abs/1996ApJ...462..563N
"A Universal Density Profile from Hierarchical Clustering" Navarro, Frenk & White, 1997, ApJ, 490, 493 http://adsabs.harvard.edu/abs/1997ApJ...490..493N
"The structure of star clusters. III. Some simple dynamical models", King, 1966, AJ, 71, 64 http://adsabs.harvard.edu/abs/1966AJ.....71...64K DONE
"On the problem of distribution in globular star clusters", Plummer, 1911, MNRAS, 71, 460 http://adsabs.harvard.edu/abs/1911MNRAS..71..460P
"A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae" Hubble, 1929, PNAS, 15, 168 http://adsabs.harvard.edu/abs/1929PNAS...15..168H
I'd also like to include the Shapley and Curtis papers from the May 1921 issue of the Bulletin of the National Research Council (following their debate on the size of the Universe etc in 1920), but I can't seem to find them.
"Large-Scale Effects of Supernova Remnants on the Galaxy: Generation and Maintenance of a Hot Network of Tunnels", Cox & Smith (1974), ApJL, 189, 105 http://adsabs.harvard.edu/abs/1974ApJ...189L.105C . A classic theory paper. DONE
"Long gamma-ray bursts and core-collapse supernovae have different environments", Fruchter et al. (2006), Nature, 441, 563 http://adsabs.harvard.edu/abs/2006Natur.441..463F A good recent observational paper.
"Extragalactic Ionized Hydrogen in the Fornax Cluster", Bland-Hawthorn et al. (1995), ApJL, 447, 77 http://adsabs.harvard.edu/abs/1995ApJ...447L..77B Intriguing home-grown result.
"Galactic Bridges and Tails", Toomre & Toomre, 1972, ApJ, 178, 623 http://adsabs.harvard.edu/abs/1972ApJ...178..623T
"On the Infall of Matter Into Clusters of Galaxies and Some Effects on Their Evolution", Gunn & Gott, 1972, ApJ, 176, 1 http://adsabs.harvard.edu/abs/1972ApJ...176....1G
"On the Density of Neutral Hydrogen in Intergalactic Space" Gunn & Peterson, 1965, ApJ 142, 1633 http://adsabs.harvard.edu/abs/1965ApJ...142.1633G Suggested by Scott Croom
"On the Correlation Between Metallicity and the Presence of Giant Planets" M. Haywood, 2009 ApJ 698 L1-L5 http://adsabs.harvard.edu/abs/2009ApJ...698L...1H Tim Bedding.
"The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies" Croton et al. (2006), MNRAS, 365, 11 http://adsabs.harvard.edu/abs/2006MNRAS.365...11C suggest by Scott Croom
"A Systematic Study of Radio-induced X-Ray Cavities in Clusters, Groups, and Galaxies" Birzan et al. (2004), ApJ, 607, 800 http://adsabs.harvard.edu/abs/2004ApJ...607..800B suggested by Scott Croom