There's a vastness to West Texas that maps just can't convey. You can travel the region's Sun-bleached roads for hours and not encounter a single Starbucks or Whataburger. This remoteness, coupled with abundant clear, dry night skies, long ago drew astronomers from the University of Texas to the town of Fort Davis and especially to the commanding view from atop nearby Mount Locke, 6,790 feet (2,070 m) above sea level.
But for the past two weeks, McDonald Observatory's mountaintop perch has been under siege, as a catastrophic inferno dubbed the Rock House Fire has decimated more than 300 square miles of the surrounding countryside. Dozens of homes and businesses have been destroyed in Fort Davis, which is about 10 miles to the observatory's southeast.
Last week, when the fire had crept to within about a mile of Mount Locke, firefighters used a control burn on a nearby peak to consume tinder-dry vegetation that would otherwise have provided the raging flames with a pathway to the observatory. Most of McDonald's 80-person staff and their families evacuated. One of the few who stayed was senior program coordinator Frank Cianciolo, who took the dramatic image seen here and several others.
The National Forest Service reports that the fire is now 75% contained and, fortunately, the observatory is out of danger. Its visitor center reopened on Wednesday. Also in the clear is the historic Prude Ranch, which will host the 32nd annual Texas Stary Party from May 29th to June 5th. No fires have been reported on the sprawling ranch, and in fact no burned land is visible in any direction from meeting site. "Of course, with the continued dry conditions this may change," notes TSP staffer Dave Clark. "But
burned areas tend not to reburn so we may be relatively safe from any new large wildfire."
McDonald Observatory hosts four major instruments. Its first, the 2.1-m (82-inch) Otto Struve Telescope, was erected in 1939. The most recent addition, the enormous Hobby-Eberly Telescope, boasts a 30-foot (9.2-m) aperture. Specializing in spectroscopic work, the HET saw first light in 1996.
The Rock House Fire brought back vivid memories of another major conflagration in 2009 that threatened — but ultimately spared — Mount Wilson Observatory. However, historic Mount Stromlo Observatory wasn't as fortunate: in 2003 a ferocious brushfire overran the compound near Canberra, Australia, and destroyed six of its telescopes.