At 9:32 a.m. EDT, the swing arms move away and a plume of flame signals the liftoff of the Apollo 11 Saturn V space vehicle from Kennedy Space Center Launch Complex 39A. Image credit: NASA

I often surf by NASA's website for the Image of the Day, but NASA's site holds an inexhaustible supply of imagery. One of my favorite sections is their historical collection, Great Images In NASA:

http://grin.hq.nasa.gov/index.html

NASA is a taxpayer-supported agency, so these images appropriately have been placed in the public domain. They can be used for most purposes (that's you, bloggers!) without prior permission as long as they aren't copied in a manner implying NASA's endorsement of a particular product.

If you're in need of space & aeronautics images, GRIN should be one of your first stops. You'll find the same photos spread elsewhere across the web, as happens to public domain, but GRIN presents them with the original detailed captions and in astoundingly high resolution.

This 1999 image from NASA's Hubble Space Telescope and its Wide Field and Planetary Camera 2 (WFPC2) shows the unique galaxy pair called NGC 3314. Image credit: NASA.

NASA research pilot Bill Dana takes a moment to watch NASA's NB-52B cruise overhead after a research flight in the HL-10. Image credit: NASA