Star Cluster: Difference between revisions

→Orion Nebula: Reformatting sections for clarity.
→Orion Nebula: Formatting
Line 64: Line 64:
|The '''Trapezium''' or Orion Trapezium Cluster, also known by its Bayer designation of Theta Orionis, is a tight open cluster of stars in the heart of the '''Orion Nebula''', in the constellation of Orion.  It is a relatively young cluster that has formed directly out of the parent nebula and may be a sub-component of the larger '''Orion Nebula Cluster'''.
|The '''Trapezium''' or Orion Trapezium Cluster, also known by its Bayer designation of Theta Orionis, is a tight open cluster of stars in the heart of the '''Orion Nebula''', in the constellation of Orion.  It is a relatively young cluster that has formed directly out of the parent nebula and may be a sub-component of the larger '''Orion Nebula Cluster'''.
This star cluster is most readily identifiable by the asterism of four relatively bright stars for which it is named. The four are often identified as A, B, C, and D in order of increasing right ascension. The brightest of the four stars is C, or Theta Orionis C.
This star cluster is most readily identifiable by the asterism of four relatively bright stars for which it is named. The four are often identified as A, B, C, and D in order of increasing right ascension. The brightest of the four stars is C, or Theta Orionis C.
|[[File:NGC 3590.png|thumb|220x220px]]
|
|-
|-
|
|
=== NGC 1981 ===
|
|-
|'''NGC 1981''' is a young, bright open cluster visible in the constellation of Orion.  It is a collection of about 20 or so stars (largely magnitudes 7 through 10) and is about 40 light-years closer to Earth than the Orion Nebula.
|[[File:NGC 1981.png|thumb|220x220px]]
|-
|
|
|}
=== Trapezium ===
The '''Trapezium''' or Orion Trapezium Cluster, also known by its Bayer designation of Theta Orionis, is a tight open cluster of stars in the heart of the '''Orion Nebula''', in the constellation of Orion.  It is a relatively young cluster that has formed directly out of the parent nebula and may be a sub-component of the larger '''Orion Nebula Cluster'''.
This star cluster is most readily identifiable by the asterism of four relatively bright stars for which it is named. The four are often identified as A, B, C, and D in order of increasing right ascension. The brightest of the four stars is C, or Theta Orionis C.
=== NGC 1981 ===
[[File:NGC 1981.png|thumb|220x220px|NGC 1981]]
'''NGC 1981''' is a young, bright open cluster visible in the constellation of Orion.  It is a collection of about 20 or so stars (largely magnitudes 7 through 10) and is about 40 light-years closer to Earth than the Orion Nebula.   
[[File:Collinder 70.png|thumb|220x220px|COLLINDER 70]]
=== Collinder 70 ===
=== Collinder 70 ===
'''Collinder 70 is '''a large open cluster, located around the belt of Orion.  It includes all three belt stars: Mintaka (the Girdle), Alnilam (The string of Pearls) and Alnitak (the Belt). The cluster has a diameter of almost 3 degrees and consists of 100 stars or more.    
|
 
|-
[[File:Collinder 69.png|thumb|220x220px|COLLINDER 69]]
|'''Collinder 70 is '''a large open cluster, located around the belt of Orion.  It includes all three belt stars: Mintaka (the Girdle), Alnilam (The string of Pearls) and Alnitak (the Belt). The cluster has a diameter of almost 3 degrees and consists of 100 stars or more.
 
|[[File:Collinder 70.png|thumb|220x220px]]
|-
|
=== Collinder 69 ===
=== Collinder 69 ===
'''Collinder 69''' is an open star cluster located north-west of the star Betelgeuse in the constellation of Orion. It is about five million years old and roughly 1,300 ly (400 pc) away from the Sun.  Included within the cluster is a double star named Meissa.
|
 
|-
|'''Collinder 69''' is an open star cluster located north-west of the star Betelgeuse in the constellation of Orion. It is about five million years old and roughly 1,300 ly (400 pc) away from the Sun.  Included within the cluster is a double star named Meissa.
|[[File:Collinder 69.png|thumb|220x220px|COLLINDER 69]]
|-
|
=== NGC 1976 ===
=== NGC 1976 ===
[to come]
|
 
|-
|[to come]
|
|-
|
=== NGC 1977 ===
=== NGC 1977 ===
 [to come]
|
 
|-
|[to come]
|
|-
!
=== NGC 2232 ===
=== NGC 2232 ===
[[File:NGC 2232.png|thumb|220x220px|NGC 2232]]
|
'''NGC 2232''' is a bright open star cluster in the constellation Monoceros centered on the star '''10 Monocerotis'''.  
|-
|'''NGC 2232''' is a bright open star cluster in the constellation Monoceros centered on the star '''10 Monocerotis'''.


It consists of about 20 stars.
It consists of about 20 stars.
 
|[[File:NGC 2232.png|thumb|220x220px|NGC 2232]]
|-
|
=== NGC 1980 ===
=== NGC 1980 ===
[to come]
|
|-
|[to come]
|
|}


=== Navigation ===
=== Navigation ===