Zigging east-southeast to 3rd-magnitude Delta (δ) Cygni, we now look about 1¾˚ northeast for the 7th-magnitude open cluster NGC 6811. Popularly known as the “Hole in the Cluster,” this ...

The new projected augmented reality system will be further developed and commercialized through the recently launched VTT's spinoff Delta Cygni Labs. Expert knowledge is necessary to support the ...

Unlike pulsating variable stars, typified by Mira (Omicron [ο] Ceti) and Delta (δ) Cephei, SS Cygni owes its brightness changes to an interaction between the members of a close binary system ...