For North American stargazing fans, the Clear Sky Chart offers a helpful series of charts that provide up-to-date forecasts of over 1,400 observatories in the United States, Canada, Mexico, and the Bahamas. These charts...

This is the data release from the Two Micron All Sky Survey. This release covers 2,483 deg2 of northern sky observed from the 2MASS facility at Mt. Hopkins, AZ. The release data products include 233,979 compressed...