"Weighing In on a Star: A stellar size limit" (SN: 3/12/05, p. 164) includes three images of the Arches cluster near the center of the Milky Way, each taken with a different telescope. I'd be interested to know what the three telescopes are.
In the trio of progressively sharper (left to right) images, the leftmost one was taken in 1994 with a 3-meter telescope at the Lick Observatory in California, the middle image was taken in 1996 by the 10-m Keck 1 telescope atop Hawaii's Mauna Kea, and the rightmost picture was taken in 1997 by the Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer.—R. Cowen
The many reports of the explorations of Mars looking for water ("Martian Landscaping: Spacecraft eyes evidence of a frozen sea," SN: 3/5/05, p. 149) seem to be mo