On October 9, 2008 at 1:06PM CDT (19:06 UTC), The Cassini probe orbiting Saturn just flew within 25 kilometers of the moon Enceladus’ surface. That’s 82,000 feet. The altitude the SR-71 flew at or a little over twice as high that most commercial jets fly at. All I can say is wow, just wow!

Cassini flyby of Enceladus
Emily Lakdallawalla of the Planetary Society detailed Cassini’s itinerary Cassini flies within 25 kilometers of Enceladus tomorrow

And JPL scientist Shadan Ardalan, Cassini Navigator tells us Cassini made it Xtreme Navigation,Not for the Faint of Heart