Astronomy Picture of the Day: Star Trails and the Bracewell Radio Sundial

Sundials use the location of a shadow to measure the Earth's rotation and indicate the time of day.

Astronomy Picture of the Day: NGC 6960: The Witch's Broom Nebula

Ten thousand years ago, before the dawn of recorded human history, a new light would have suddenly have appeared in the night sky and faded after a few weeks

Butterfly nebula in Cygnus constellation

butterfly nebula and sadr region in the constellation cygnus

Region around NGC7000 ( North America Nebula )

سحابی ویل Veil nebula

Northern Cygnus Nebulae

بخش شمالی صورت فلکی قو و سحابی های اطراف آن.

fireworks ngc 6946 & ngc 6939

سحابی ویل. Veil Nebula

Supernova Remanent NGC 6960 veil nebula باقی مانده ابرنواختر، سحابی ویل

Gamma Cygnus ) A part of Emission nebula "IC1318 )

Northern Cygnus