A study published in Astronomy & Astrophysics has identified four previously unknown primordial open cluster (OC) groups in the Milky Way. Open clusters, loose assemblies of stars born from the ...

NGC 6355 has been imaged using NASA's Hubble Space Telescope. The globular cluster of stars lies 50,000 light-years away.

Abell 2255 is a cluster containing between 300 and 500 constituent galaxies, many of which are merging. It's located around ...

Using NASA's Chandra X-ray space telescope, astronomers have discovered that a galaxy cluster is wrapped in an envelope of ...

More information: Guimei Liu et al, Formation and evolution of new primordial open cluster groups: Feedback-driven star formation, Astronomy & Astrophysics (2025). DOI: 10.1051/0004-6361/202452774 ...

Ngā Mata o te Ariki, more commonly known as Matariki, was first officially recognised as a national public holiday in New Zealand in 2022. It was announced ...

Astronomers have discovered a huge filament of hot gas bridging four galaxy clusters. At 10 times as massive as our galaxy, ...

Star clusters aren't the only "well-placed" celestial objects this month. The Lagoon Nebula, or Messier 8, is a swirling cloud of interstellar gas where stars are born, located some 5,200 light ...

Logan Pass Star Parties at Glacier National Park July 25 and August 22, 2025 The Big Sky Astronomy Club hosts two nights of out-of-this-world stargazing during the new moon at Glacier National ...

Later in the month, you can see Venus with the naked eye, along with the Pleiades and Hyades star clusters and the bright, orange-hued star Aldebaran. From June 22 to 24, ...

Some clusters are small and loose, called open clusters, and you’ll find them scattered across the arms of spiral galaxies like our Milky Way. Others are massive and tightly packed, called globular ...

There’s now a 50-50 chance this galaxy will crash into ours. Astronomers have long thought that the Milky Way is headed for an inevitable crash with its neighbor, Andromeda.