Home Observatory: Background

After 11 years of visual astronomy, traveling to darker skies and hoping for good weather were yielding too few actual nights under the stars. It was time to build a home observatory: The Robservatory was born.

By far, the biggest challenge for amateur and professional astronomers worldwide is the rapid and relentless disappearance of dark skies as a result of light pollution. To counter this effect, the imaging of certain objects which transmit light at special frequencies (typically emission nebula, planetery nebula, and some galaxies) can be done through narrowband filters, which transmit light only at these very specific, narrow wavelengths, while blocking broaderband light from sources such as streetlights, house lights, and even the moon.

All images on this site have been captured at The Robservatory, located 12 miles west of Manhattan, under some of the worst light pollution on the planet.

Thursday, February 26, 2009

The Rosette Nebula (Click to enlarge)







The Rosette Nebula, also known as NGC 2244, spans about 50 light-years across, lies about 4,500 light-years away, and can be seen with a small telescope. Dark filaments of dust are silhouetted by luminous hydrogen gas.Visible are globules of dark dust and gas that are slowly being eroded away by the energetic light and winds by nearby massive stars. Left alone long enough, the molecular-cloud globules will likely form stars and planets. (Text source: NASA/APOD)