RealSky CD offers:

• single-color (one passband) images
• angular resolution of 1.7 seconds
• unprecendented level of telescopic detail
• stars as faint as 19th magnitude
• built-in image processing software which allows you to scale the field size from 5 to 60 arc minutes and enhance hidden detail

The Northern Sky includes:

• images from the National Geographic Society-Palomar Observatory Sky Survey
• the sky from the northern celestial pole to -15°
• 8 CD-ROMs,Data Volume 4.8GB