The designation M stands for Messier objects. I understand the history ... where he pursued many astronomical projects. There was a growing need to organize the astronomical catalogs compiled ...

Of the 110 objects on Messier's list, 109 of them are theoretically visible on a perfect night within ... we arrived at the observatory well before astronomical twilight. Also knowing that the sunset ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

In just a few weeks, people in Arkansas will have the opportunity to explore some out-of-this-world sights at Hobbs State ...

At a meeting of the American Astronomical Society in January 1925 ... or M42 – the 42nd object in Messier’s catalog – while others were star clusters such as the Pleiades, or M45.

This image shows a detailed infrared view of Messier 17 ... infrared is essential in modern astronomy because it enables scientists to capture light from cold objects that would otherwise go ...