Messier 18 was discovered and catalogued in 1764 by Charles Messier — for whom the Messier Objects are named — during his search for comet-like objects. It lies within the Milky Way, approximately ...
The bright blue stars of the Messier 18 cluster are captured in the upper left of this new image taken by the European Southern Observatory's Very Large Telescope. Messier 18 is known as an open ...
When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. If you spend any time with astronomers, sooner or later, you'll hear them use the phrase "M" ...
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