#Open cluster

[quiltofstars]

The Rosette Nebula, C49 // Dudás László

At the center of this nebula that stretches 130 light years across is an open star cluster known as the Satellite Cluster (NGC 2244). It is the hottest stars in this cluster that are ionizing the gas surrounding them, resulting in the beautiful Rosette Nebula we see. It was English astronomer John Flamsteed (1646-1719) that found the Satellite Cluster.

[spacewonder19]

M52: Open Cluster in Cassiopeia © JWST

[without-ado]

Westerlund 1, 12000 lys away l Webb

[theofficialastronomy101]

Some of my favourite star clusters!

[livingforstars]

Bright Stars and Dark Clouds - September 25th, 1996.

"Did you ever feel like a black cloud was following you around? Don't feel bad - this even happened to the bright young stars of the open cluster NGC 6520. On the left are the cluster's bright blue stars. They formed only millions of years ago - much more recently than our ancient Sun, which formed billions of years ago. On the right is an absorption nebula from which the stars might have formed. This nebula contains much opaque dust, which blocks visible light from the many stars that would have been seen in the background. The study of open clusters is valuable for many reasons, including understanding star formation and the calibration of the distance scale of our Universe."

[turricula]

The Bubble Nebula (NGC7635) with the Scorpion Cluster (M52)

[cosmicfocus]

Gum 23

A large wedge shaped emission nebula, sliced by lanes of obscuring dust

A Nebula in Vela Also catalogued as RCW 38 Image exposure: 58 minutesImage Size:Size: 2.09° x 1.39°Image date:2024-04-11 I managed less than an hour of imaging data before the clouds came and put a stop to proceedings. This is an HII (ionised hydrogen) nebula with a very young star cluster emerging from its birthplace within the gas cloud. Gum 23 is described in Hartung’s Astronomical…

[anothercloudynight]

M41

Constellation Canis Major.

Distance: 2.300 ly

Nov 21 2023 -Montcada i Reixac

[lackaspace]

The Pleiades star cluster, my personal favorite!

Fun fact: The car company Subaru’s name and logo represent The Pleiades!

[silvereyedowl]

(source)

Pleiades: The Seven Sisters Star Cluster

Credits: Raul Villaverde Fraile

[quiltofstars]

The Satellite Cluster, C50 // Serge Sankov

In the heart of the Rosette Nebula lies the Satellite Cluster (NGC 2244). This is an extremely young star cluster at only 5 million years old. The brightest stars among them, over 400,000 times brighter than the Sun, are responsible for lighting up the gas around them.

[inkyvoids]

The Double Cluster in Perseus consists of two open star clusters near each other on the sky’s dome. Amateur astronomers know them as h and Chi Persei. The two clusters reside in the northern part of the constellation Perseus, quite close to the constellation Cassiopeia the Queen. If you have a dark sky and find Cassiopeia – which is easy, because the constellation has a distinctive M or W shape – be sure to look for Perseus, too. Then just scan between the two constellations with your binoculars for two glittering groups of stars. The Double Cluster – a breathtaking pair of open clusters, each containing supergiant suns – will be there.

[meteorologistaustenlonek]

#SomewhereDeepInTheNight "This image was obtained with the wide-field view of the Mosaic camera on the WIYN 0.9-meter telescope on Kitt Peak, Arizona. The Pleiades are an open cluster easily visible to the naked eye. The cluster is dominated by several hot, luminous and massive stars. The blue nebulosity surrounding the brightest stars are due to blue light from the stars scattering off of dust grains in the interstellar gas between us and the stars. The cluster is also known as the 'Seven Sisters'. And in Japan it is called Subaru. " NOIRLab

[theofficialastronomy101]

NGC3532 The Pincushion Cluster

[livingforstars]

The Pleiades Star Cluster - September 3rd, 1996.

"It is the most famous star cluster in the sky. The Pleiades can be seen without binoculars from even the depths of a light-polluted city. Also known as the Seven Sisters and M45, the Pleiades is one of the brightest and most easily visible open clusters in the sky. The Pleiades contains over 3000 stars, is about 400 light years away, and is only 13 light years across. Quite evident in the above photograph is the blue reflection nebula that surrounds the bright cluster stars. Low mass, faint, brown dwarfs have been found in the Pleiades."

[spacewonder19]

 Stars in the open cluster Trumpler 14 ©