There are 4 constellations whose names begin with the letter M, ranging alphabetically from “Mensa” to “Musca”. Most of these are faint, southern groupings of stars, and a few sit along the celestial equator where both hemispheres can spot them. Stargazers and curious sky-watchers use this list to learn where each one sits, when to look for it, and which stars to find first.

Constellations are recognized patterns of stars that people have used for centuries to map the night sky and tell stories. Many of the M constellations were named in the 18th century after tools and creatures, like the microscope and the fly, instead of ancient gods and heroes. One, Mensa, is the only constellation named after a real place on Earth, honoring South Africa’s Table Mountain.

Below you’ll find the table with Constellation, Hemisphere, Best Viewing Month, Notable Stars, and Description.

Constellation: This gives you the official name of each star pattern, so you can search for it, identify it on a sky map, and learn more.

Hemisphere: This tells you whether the constellation appears in the northern sky, the southern sky, or near the equator, helping you know if it’s visible from your location.

Best Viewing Month: This shows the time of year when each constellation sits highest and clearest, so you can plan the best night to go out and look.

Notable Stars: This lists the brightest or most important stars in each pattern, giving you easy reference points to locate and trace the full shape.

Description: This offers a short summary of each constellation’s meaning, history, and standout features, helping you appreciate what makes every one of them unique.

Constellations

Descriptions