Observations Under Suburban Skies
Messier 7, or Ptolemy’s Cluster, is a prominent star cluster located in the Scorpius constellation, first recorded by Claudius Ptolemy in 130 AD. This open cluster, visible to the naked eye, contains 80 stars and spans 25 light years. It symbolizes the lasting human fascination with astronomy and the cosmos.
Learn more about the cluster, including a personal observation from Wayne McGraw and photo using a Seestar S50 under suburban skies in Florida.
In the 18th century, Charles Messier cataloged celestial objects while searching for comets, including the beautiful open cluster Messier 25 (M25) in Sagittarius. Approximately 2,000 light-years away, it contains around 600 stars with no nebulosity. M25 is best viewed through binoculars or low-power telescopes during summer nights, offering a delightful starry tapestry. Also known as M25, IC 4725, Melotte 202
The Coathanger asterism, located in the constellation Vulpecula, is a distinctive pattern of ten stars resembling an old wire hanger. Initially described by Al Sufi in the 10th century, it’s not a true star cluster but an asterism. Ideal for binocular viewing, it’s perfect for casual stargazers. Also known as Brocchi’s Cluster and cataloged as Collinder 399.
NGC 1758 is a lesser-known open star cluster in the constellation Taurus. Discovered by William Herschel in 1785, it is approximately 700 million years old. Though not visible to the naked eye, it provides valuable insights into stellar evolution. Its proximity to NGC 1750 poses observational challenges.
NGC 2451, a star cluster in the Puppis constellation, shines brightly during late autumn and winter. With around 40 stars, including the prominent C Puppis, it’s visible with binoculars. The cluster is an optical illusion of two separate groups. First noted by Hodierna in the 17th century, NGC 2451 offers a captivating viewing experience.
The constellation Cygnus is rich with countless celestial objects. Among these is the open star cluster NGC 6819, a great assembly of stars also known as the Foxhead Cluster. Backyard astronomers can enjoy visiting the fox head on summer and autumn nights, much like the pioneering astronomer Caroline Herschel, who first observed it on May 12, 1784.
The faint winter constellation Monoceros features a nice collection of star clusters and deep sky objects, including the famous Christmas Tree cluster and Avery’s Island, also known as NGC 2353. The cluster features more than 100 stars.
High above Orion’s Nebula and belt lies the star cluster NGC 2169, affectionately known as the “37 Cluster.” This arrangement of stars earned its nickname due to its resemblance to the number 37 when viewed through a small telescope or binoculars. It’s also known as Collinder 83, XY Cluster, and the LE Cluster
The Garden Astronomer