This image combined 24 minutes each of red, green and blue exposures, for a total of 72 minutes exposure. An ST10XME camera was used through a TEC 140mm refractor at my home astroshed under light-polluted skies.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Open Cluster M67 in Cancer | ||||||||||||||||||
|
||||||||||||||||||
|
||||||||||||||||||
|
||||||||||||||||||
| Open Cluster M67 contains about 500 stars at a distance of 2700 light years, in the direction of constellation Cancer. M67's age of over 3 billion years is much older than most other open clusters. Usually, the weak gravitational attraction of the loosely grouped open clusters allows them to become disrupted by interaction with other stars, clusters, and interstellar gas and dust. Thus, most open clusters only survive intact for a few hundred million years, and so remain dominated by young bright blue-white stars, which burn out faster than dimmer yellow and red suns. In contrast, this image of M67 shows mostly white and yellow suns, indicative of its greater age. It is unclear why M67 has survived so long, but some have suggested that because M67 is slightly above the galactic plane, it may have avoided the type of gravitational interactions that disperse most open clusters. This image combined 24 minutes each of red, green and blue exposures, for a total of 72 minutes exposure. An ST10XME camera was used through a TEC 140mm refractor at my home astroshed under light-polluted skies. |
||||||||||||||||||
|
||||||||||||||||||
|
||||||||||||||||||
|
||||||||||||||||||
| Music: Living in the Past, by Tull | ||||||||||||||||||