M 71 – Sge

M 71


Globular clusters are famous for their high concentration of stars: even one million stars closely packed together by gravity. But sometimes we find significantly loose bodies, making them like a dense open cluster.

This is the case of Messier 71 (more data),a wonderful, bright globular cluster with a shape sitting between globular and open clusters. Discovered by Philippe Loys de Chéseaux in 1745-1746, M 71 has been a puzzling object up to 1970’s, suggesting contrasting classifications and observations. Now, modern photometry provided evidence for it to be a globular cluster.

The image above is the average of 15, 120-seconds exposures, remotely taken with the PlaneWave 17 robotic unit part of the Virtual Telescope Project. All images were unguided. Image scale is about 0.7″/pixel.


Back to “Star Clusters” page



Support The Virtual Telescope Project!

If everyone reading this right now would donate something, our fundraiser would be done in a few days. Please, donate and receive stunning, LIMITED EDITION images with the Tiangong 1 and International Space Station above Rome and one of a potentially hazardous asteroid taken by the Virtual Telescope, specifically made for supporters like you!

donate now (you can adjust the amount later)




You may also like...

Leave a Reply

Your email address will not be published.


Get every new post on this blog delivered to your Inbox.

Join other followers: