Messier 100 (M100) is a grand design spiral galaxy located 55 million light-years away in Coma Berenices. Discovered by Pierre Méchain in 1781, it features symmetrical arms with vibrant star-forming regions. M100 is both visually striking and dynamic, making it a favorite for amateur astronomers. This post provides history and personal observations using a Seestar S50. Also known as NGC 4321, UGC 7450, PGC 40153.
Tag Archives: Astronomy
Messier 7 (NGC 6475): Ptolemy’s Ancient Cluster Still Shines Bright
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.
The Coathanger Asterism: A Cosmic Clothes Hanger in the Summer Sky
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.
Finally Meeting Pluto: A Personal Milestone Under Florida Skies
The author shares about seeing the dwarf planet Pluto from Tampa, Florida using a Seestar S50. Photos of the planet are included.
Xi Serpentis (Nehushtan): A Triple Star in Serpens
Nehushtan, or Xi Serpentis, is a triple star system in the Serpens constellation, 105 light-years away. It will approach within 27 light-years in about 700,000 years. Named after a biblical idol, it showcases the intertwining of astronomy and faith. Observations highlight its brightness and challenging visibility of companions. Also known as 55 Ser, Xi Ser, SAO 160700, HD 159876, HIP 86263, HR 6561, GC 23881
Beta Serpentis: Binary Star and Traveler in the Ursa Major Group
Beta Serpentis is a binary star in the summer constellation Serpens. Of note, the pair also belong to the Ursa Major Moving Group.
Zeta Aquarii (Struve 2909): A Tight Binary Near the Water Bearer’s Shoulder
Zeta Aquarii, a binary star system in Aquarius, is about 92 light-years away. First identified by William Herschel in 1777, it appears as a single point to the naked eye. Both stars are similar F-type main-sequence stars, orbiting each other every 587 years, exhibiting complexity beneath their apparent simplicity. This post explores the star and illustrates what it looks like in the telescope. Also known as: STF 2909, SAO 146108, HIP 110960, GC 31398, HR 8558, Zet1 Aqr, 55 Aquarii, HD 213052, 55 Aqr
Struve 1850: A Wide Binary Star in Boötes
Struve 1850, a binary star system in the Boötes constellation, consists of two nearly identical A1V stars, easily observable with binoculars or small telescopes. Discovered by Friedrich Struve in 1823, they are over 800 light-years away. Their similar luminosity and proximity make them delightful targets for amateur astronomers. Also known as: STF 1850, HD 127067, SAO 83374, HIP 70786, HR 5414
The Garden Astronomer 