On a warm day it is not unusual to see a glider spiraling over Palomar Mountain. Occasionally they come close enough to the observatory that you can actually hear them.
We had gliders out last Saturday when Brad Eells of the Forest Fire Lookout Association took this photo:
Brad took this unique photo from the old fire lookout tower at High Point, which looks down on the observatory. To the left of the glider are the domes of the 48-inch Samuel Oschin Telescope and the much larger 200-inch Hale Telescope. To the right of the glider is the dome of the 24-inch telescope and the observatory's water tower.
For another shot of a glider over the observatory, check out this post from 2009.
I know that blog posts here have been rare lately, that is starting to change as I have plenty of material to share. Be sure to check back for more this week.