Ganymede
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What's your favorite telescope or binoculars to st...
January 10, 2026 at 11:00pm
The Small Sagittarius Star Cloud (also known as Messier 24 and IC 4715) is a star cloud in the constellation of Sagittarius approximately 600 light years wide, which was catalogued by Charles Messier in 1764. It should not be confused with the…
Where the night sky is the main event | Astronomy.com
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The Summer Triangle is called that because its three bright stars dominate the high night sky during the summer months in the Northern Hemisphere.
It is an asterism, which is an easy-to-recognize pattern of stars rather than an official…
It is an asterism, which is an easy-to-recognize pattern of stars rather than an official…
Messier 4 or M4 (also known as NGC 6121 or the Spider Globular Cluster) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. It was the first…
What's Up: Skywatching Tips from NASA
NASA's monthly skywatching tips.
NASA's monthly skywatching tips.
Hoag's Object is an unusual ring galaxy in the constellation of Serpens Caput. It is named after Arthur Hoag, who discovered it in 1950 and identified it as either a planetary nebula or a peculiar galaxy. The galaxy has a D25 isophotal diameter of…
September Podcast: Vega & Its Vicinity
This episode takes you on a tour of the stars and planets that you’ll see overhead during September. First, we’ll check out this month’s equinox and Harvest Moon; then we’ll track down the bright planets, explore some lesser-known constellations,…
This episode takes you on a tour of the stars and planets that you’ll see overhead during September. First, we’ll check out this month’s equinox and Harvest Moon; then we’ll track down the bright planets, explore some lesser-known constellations,…
What's in the Sky This Month | September 2026 Sky Guide
Mercury appears low over the western horizon and is only really visible in the last ten days of the month, with binoculars and a clear horizon definitely being...
Mercury appears low over the western horizon and is only really visible in the last ten days of the month, with binoculars and a clear horizon definitely being...
September 2026: What's in the sky this month?
Neptune is at its best for the year, while Mars and Jupiter dominate the morning sky and Venus shines brightly after sunset.
Neptune is at its best for the year, while Mars and Jupiter dominate the morning sky and Venus shines brightly after sunset.
The Wild Duck Cluster (also known as Messier 11, or NGC 6705) is an open cluster of stars in the constellation Scutum (the Shield). It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue of diffuse objects in…
Messier 38 (M38), also called the Starfish Cluster, is an open star cluster located in the constellation Auriga.
Object Type: Open star cluster Other Designations: NGC 1912, Starfish Cluster Constellation: Auriga Distance: About 3,500 to 4,200…
Object Type: Open star cluster Other Designations: NGC 1912, Starfish Cluster Constellation: Auriga Distance: About 3,500 to 4,200…
Messier 37 (M37 or NGC 2099) is a rich open star cluster in the constellation Auriga. Located about 4,511 light-years from Earth, it shines at a magnitude of 6.2 and holds over 500 stars, earning the nickname the "Salt and Pepper Cluster".…
Messier 36 (M36), also called the Pinwheel Cluster, is a young open star cluster in the constellation Auriga. It lies about 4,100 light-years away and contains roughly 60 member stars. Discovered before 1654 by Giovanni Battista Hodierna, it shines…
Andromeda’s star formation is slowing down
Hubble data reveal a 500-million-year decline in Andromeda's star formation, with the steepest drop coming in just the last 40 million years.
Hubble data reveal a 500-million-year decline in Andromeda's star formation, with the steepest drop coming in just the last 40 million years.
