August (contintued)
- Aug 24 - Asteroid 2005 QQ87 Near-Earth Flyby (0.079 AU)
- Aug 24 - Asteroid 1566 Icarus Closest Approach To Earth (1.209 AU)
- Aug 24-29 - 15th International Conference on the Origin of Life, Florence, Italy
- Aug 25 - Northern Iota Aquarids Meteor Shower Peak
- Aug 25 - 5th Anniversary (2003), Spitzer Space Telescope Launch
- Aug 26 - Asteroid 9965 GNU Closest Approach To Earth (1.418 AU)
- Aug 27 - Comet P/1997 V1 (Larsen) Perihelion (3.272 AU)
- Aug 27-Sep 06 - 3rd Network of European Observatories in the North (NEON) Archive Observing School, Garching, Germany
- Aug 28 - Asteroid 2006 JY26 Near-Earth Flyby (0.085 AU)
- Aug 28 - 15th Anniversary (1993), Galileo Flyby of Asteroids Ida & Dactyl
- Aug 29 - Asteroid 2000 BM19 Near-Venus Flyby (0.034 AU)
- Aug 29 - Asteroid 2005 GQ21 Near-Mars Flyby (0.038 AU)
- Aug 29 - Asteroid 2004 RX10 Near-Venus Flyby (0.039 AU)
- Aug 30 - 25th Anniversary (1983), STS-8 Launch (Guy Bluford, 1st African-American in Space)
- Aug 31 - Asteroid 4305 Clapton Closest Approach To Earth (2.101 AU)
- Aug 31 - Asteroid 1815 Beethoven Closest Approach To Earth (2.494 AU)
September
- Sep 01 - Asteroid 1998 SD9 Near-Earth Flyby (0.024 AU)
- Sep 01 - Asteroid 951 Gaspra Closest Approach To Earth (0.916 AU)
- Sep 01-05 - 7th Microquasar Workshop, Foca, Izmir, Turkey
- Sep 02 - Cassini, Distant Janus Flyby
- Sep 02 - Asteroid 3267 Glo Closest Approach To Earth (1.125 AU)
- Sep 03 - Asteroid 10221 Kubrick Closest Approach To Earth (1.516 AU)
- Sep 03 - Cassini, Distant Methone Flyby
- Sep 03 - Asteroid 5254 Ulysses Closest Approach To Earth (4.140 AU)
- Sep 04 - Asteroid 2004 ST26 Near-Ceres Flyby (0.018 AU)
- Sep 05 - Rosetta, Asteroid 2867 Steins Flyby
- Sep 05-09 - IAU Symposium 257: Universal Heliophysical Processes, Ioannina, Greece
- Sep 06 - Comet Shajn-Schaldach Perihelion (2.108 AU)
- Sep 07 - Asteroid 2003 WT153 Near-Earth Flyby (0.015 AU)
- Sep 07 - Asteroid 2000 RK12 Near-Earth Flyby (0.059 AU)
- Sep 07 - Asteroid 3767 DiMaggio Closest Approach To Earth (1.922 AU)
- Sep 07-12 - 11th Electromagnetic and Light Scattering Conference, Hatfield, United Kingdom
- Sep 08 - Asteroid 2001 QL163 Near-Earth Flyby (0.062 AU)
- Sep 08-11 - 7th INTEGRAL Workshop: Compact Objects, Copenhagen, Denmark
- Sep 08-12 - Workshop: Future Ground based Solar System Research - Synergies with Space Probes and Space Telescope, Livorno, Italy
- Sep 08-12 - Meeting: Cosmic Dust - Near & Far, Heidelberg, Germany
- Sep 08-12 - Joint European and National Astronomy Meeting (JENAM-2008): New challenges to European Astronomy, Vienna, Austria
- Sep 09 - 30th Anniversary (1978), Venera 11 Launch (USSR Venus Lander)
- Sep 10 - Cassini, Distant Epimetheus Flyby
- Sep 10 - Asteroid 2000 DP107 Near-Earth Flyby (0.058 AU)
- Sep 10 - Asteroid 2005 QC5 Near-Venus Flyby (0.039 AU)