Building a backyard observatory 25 years ago usually meant one of two things: Buy a dome or do it yourself from scratch. A simple “roll-off roof ” observatory was also an alternative.

Next decision: type and size. I built a big roll-off roof observatory in the mid-’80s. No one helped me, and I made major mistakes. I put the roof on swiveling casters. Don’t do that.

Join Miguel here as he takes us through his photograph "Cumeada Observatory and the Winter Sky." After astronomical twilight has ended, a motorized, retractable, "roll-off-roof" observatory opens ...

The college observatory uses a wide roll-off roof that can be pulled back to reveal the cosmos to the stationary telescopes stored inside. But that doesn’t do much good if the sky is cloudy.

The comet -- officially catalogued as 2014 Q2, or Q2 for short -- was discovered last year by amateur astronomer Terry Lovejoy from his roll-off roof observatory in Birkdale, Queensland ...

In the building closest to the planetarium, two telescopes were set up Friday under the building’s open 20-foot roll-off roof. When not in use for a workshop, Vinski said the observatory would ...

The observatory features a 17” PlaneWave telescope on an L-500 mount. The telescope is housed in a structure with a roll-off roof offering a 360° view of the night sky and surrounding skyline.

Six or eight nights a month, weather permitting, the Chandlers open the roll-off roof of their observatory and focus 25- and 30-inch reflecting telescopes on whatever objects are on their current ...