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DEEP SKY OBJECTS M91 TO M95 |
Messier Number: M91
NGC Number: NGC 4548
Object Type: Barred Spiral Galaxy
Distance in Light Years: 60,000,000
Constellation: Coma Berenices
Apparent Magnitude: 10.2
Confirmed at a 60 million light years by recent measurements, the barred spiral galaxy M91 is now placed as a member of the Virgo Cluster of Galaxies. M91 has a conspicuous bar and
lies at an angle of 65/245 degrees (as measured from the North direction to the East).
M91 is one of the more difficult Messier objects although Suggestions of the bar may be seen at medium power even in smaller telescopes, if the viewing conditions are good
enough to see the galaxy at all. Photos show the bar more clearly, and show the spiral arms emanating from the ends of the bar.
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Messier Number: M92
NGC Number: NGC 6341
Object Type: Globular Cluster
Distance in Light Years: 26,000
Constellation: Hercules
Apparent Magnitude: 6.4
M92 is only a little more distant than its brighter apparent neighbour M13. An estimate of M92's age has been given as about 16 billion years and it is approaching us at 112 km/sec.
A splendid object visible to the naked eye under good conditions, M92 is a showpiece for all optics. It is only slightly less bright but about
1/3 less extended than M13, its 14.0' angular extension corresponds to a true diameter of 109 light years and may have a mass of up to 330,000 suns.
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Messier Number: M93
NGC Number: NGC 2447
Object Type: Open Cluster
Distance in Light Years: 3,600
Constellation: Puppis
Apparent Magnitude: 6.0
M93 is at a distance of about 3,600 light years from Earth and has a spatial diameter of some 20 to 25 light years. The brightest stars are blue giants of type B9
and its age is estimated at some 100 million years.
Although bright, it is one of the smaller open clusters with about 80 members which appear scattered over its 22' apparent diameter.
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Messier Number: M94
NGC Number: NGC 4736
Object Type: Spiral Galaxy
Distance in Light Years: 14,500,000
Constellation: Canes Venatici
Apparent Magnitude: 8.2
Spiral galaxy M94 has an extremely bright inner region with a 70" diameter and an outer region of about 600". These regions (rings) appear to form at resonance locations
within the disk of the galaxy. The inner region is surrounded by a ring of active star-forming regions, sometimes referred to as a starburst ring, traced by young blue star
clusters sharply separated from a much less bright outer ring of an older yellowish stellar population. In the outskirts, this region however ends again in a ring with
moderate star formation activity, so that M94 is one of the relatively rare galaxies in which two "waves" of stellar formation can be observed. In very long exposures,
a further very faint ring, about 15 arc minutes across, can ve detected.
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Messier Number: M95
NGC Number: NGC 3351
Object Type: Spiral Galaxy
Distance in Light Years: 38,000,000
Constellation: Leo
Apparent Magnitude: 9.7
M95 is an attractive barred spiral galaxy situated in the constellation of Leo and one of the fainter Messier Objects.
M95 is a member of the Leo I or M96 group, which also contains M96, M105 and a number of fainter galaxies.
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