Star Clusters

 Cosmic Tribune

The red supergiant Antares and its spectacular field of view

The red supergiant Antares and its spectacular field of view

[CLICK ON IMAGE FOR HIGH RESOLUTION] Why is the sky near Antares and Rho Ophiuchi so colorful? … Fine dust illuminated from the front by starlight produces blue reflection nebulae. Gaseous clouds whose atoms are excited by ultraviolet starlight produce reddish emission nebulae. Backlit dust clouds block starlight and so appear dark. Antares, a red […]

 Cosmic Tribune

‘Beautiful’ nebula to Messier, M5 is actually a spectacular cluster with 100,000 stars

‘Beautiful’ nebula to Messier, M5 is actually a spectacular cluster with 100,000 stars

Though it appeared to Messier to be fuzzy and round and without stars, Messier 5 (M5) is now known to be a globular star cluster, 100,000 stars or more, bound by gravity and packed into a region around 165 light-years in diameter. It lies some 25,000 light-years away. Roaming the halo of our galaxy, globular […]

 Cosmic Tribune

Spectacular morning lineup

Spectacular morning lineup

[CLICK ON IMAGE TO ZOOM] Early morning dog walkers got a visual treat last week as bright stars and planets appeared to line up. Pictured above, easily visible from left to right, were the Pleiades open star cluster, Jupiter, Venus, and the “Follower” star Aldebaran, all seen before a starry background. The image was taken […]