May (continued)
- May 09 - Comet 183P/Korlevic-Juric Perihelion (3.894 AU)
- May 09 - Asteroid 327 Columbia Closest Approach To Earth (1.726 AU)
- May 09 - Asteroid 55 Pandora Closest Approach To Earth (2.076 AU)
- May 09-12 - 6th Serbian Bulgarian Astronomical Conference, Prokuplje, Serbia
- May 10 - Astronomy Day
- May 10 - Phoenix, Trajectory Correction Maneuver #4 (TCM-4)
- May 10 - Asteroid 2004 XM29 Near-Earth Flyby (0.089 AU)
- May 10 - Asteroid 7853 Confucius Closest Approach To Earth (1.677 AU)
- May 11 - Asteroid 3001 Michelangelo Closest Approach To Earth (1.568 AU)
- May 11 - Richard Feyman's 90th Birthday (1918)
- May 12 - Cassini, Titan Flyby
- May 12 - Asteroid 9618 Johncleese Closest Approach To Earth (1.492 AU)
- May 12 - Asteroid 4055 Magellan Closest Approach To Earth (2.040 AU)
- May 12-14 - SPA/SCEA 2008 Joint Annual Conference, Noordwijk, The Netherlands
- May 12-16 - SpaceOps 2008 Conference: Protecting the Earth, Exploring the Universe, Heidelberg, Germany
- May 12-16 - Summer School: New Path Towards Quantum Gravity, Holbek, Denmark
- May 13 - Asteroid 69230 Hermes Closest Approach To Earth (0.325 AU)
- May 13 - Asteroid 5050 Doctorwatson Closest Approach To Earth (1.675 AU)
- May 14 - Progress M-64 Soyuz U Launch (International Space Station 29P)
- May 14 - Mercury At Its Greatest Eastern Elongation (22 Degrees)
- May 14 - Comet Shoemaker 4 Closest Approach To Earth (2.821 AU)
- May 14 - 35th Anniversary (1973), Skylab Launch
- May 15 - Lecture: Landing a Backhoe on Mars, Pasadena, California
- May 15 - Louis de Lacaille's 295th Birthday (1713)
- May 15 - 45th Anniversary (1963), Mercury 9 Launch (Gordon Cooper)
- May 15-17 - Carolina International Symposium on Neutrino Physics (CISNP), Columbia, South Carolina
- May 16 - GLAST Delta 2 Launch
- May 16 - Cassini, Orbital Trim Maneuver #155 (OTM-155)
- May 16 - Asteroid 3581 Alvarez Closest Approach To Earth (1.534 AU)
- May 16 - Asteroid 16761 Hertz Closest Approach To Earth (1.957 AU)
- May 16 - Asteroid 1537 Transylvania Closest Approach To Earth (2.717 AU)
- May 16 - [a ay08.cfm href="http://www.jpl.nasa.gov/events/lectures/m]Lecture: Landing a Backhoe on Mars, Pasadena, California
- May 17 - Cassini, Distant Flyby of Calypso, Methone & Epimetheus
- May 17 - Phoenix, Trajectory Correction Maneuver #5 (TCM-5)
- May 18 - Comet Mueller 5 Perihelion (4.214 AU)
- May 18 - Comet P/2003 KV2 (LINEAR) Perihelion (1.060 AU)
- May 19 - Asteroid 6377 Cagney Closest Approach To Earth (1.252 AU)
- May 19-21 - 1st Astronomy & Astrophysics School: Scientific Writing for Young Astronomers, Blankenberge, Belgium
- May 20 - Comet 86P/Wild 3 Perihelion (2.301 AU)
- May 20 - Asteroid 8837 London Closest Approach To Earth (0.963 AU)
- May 20 - Asteroid 7861 Messenger Closest Approach To Earth (1.168 AU)
- May 20 - 30th Anniversary (1978), Pioneer Venus 1 Launch
- May 20-23 - Annual Meeting of the Canadian Astronomical Society (CASCA 2008), Victoria, Canada
- May 21 - Cassini, Orbital Trim Maneuver #156 (OTM-156)
- May 22 - Comet 148P/Anderson-LINEAR Perihelion (1.703 AU)
- May 22 - Comet C/2007 K1 (Lemmon) Closest Approach To Earth (9.081 AU)
- May 22 - Asteroid 5145 Pholus Closest Approach To Earth (21.002 AU)
- May 22 - Asteroid 19148 Alaska Closest Approach To Earth (1.957 AU)
- May 23 - Asteroid 2874 Jim Young Closest Approach To Earth (1.513 AU)
- May 23-25 - Royal Astronomical Society of New Zealand (RASNZ) Conference 2008, Lake Tekapo, New Zealand
- May 24 - Comet P/1998 VS24 (LINEAR) Perihelion (3.423 AU)
- May 24 - Comet C/2007 T5 (Gibbs) Perihelion (4.049 AU)
- May 24 - Asteroid 11365 NASA Closest Approach To Earth (1.472 AU)
- May 24 - Asteroid 11945 Amsterdam Closest Approach To Earth (1.997 AU)
- May 25 - Cassini, Orbital Trim Maneuver #157 (OTM-157)
- May 25 - Phoenix, Trajectory Correction Maneuver #6 (TCM-6)
- May 25 - Cassini, Distant Flyby of Pallene, Atlas & Janus
- May 25 - Asteroid 6318 Cronkite Closest Approach To Earth (2.544 AU)
- May 25-Jun 13 - Gravitational Wave Astronomy Aspen Summer Workshop, University Park, Pennsylvania
- May 26 - Phoenix, Mars Landing
- May 26 - Comet 180P/NEAT Perihelion (2.469 AU)
- May 26-27 - Observing with ALMA: A Workshop, Calgary, Canada