Beautiful barrel cacti stand amid the sand and rocks.
Related blog: Deep-sky observing at Rancho Hidalgo, by David J. Eicher, editor
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Astronomy magazine editors captured these images while on trips to watch sky events and/or tour historic destinations.
Visit Astronomy.com's Trips and Tours page for more information about these and other upcoming expeditions.
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224 total photos Last updated on 02-28-2010