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7 images
[Astronomical events] -
3 images
[Miscellaneous] -
6 images
[Solar System] -
2 images
[Globular Clusters ] -
2 images
[Planetary Nebulae] -
6 images
A galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas, dust, and an important but poorly understood component tentatively dubbed dark matter. [wikipedia] -
9 images
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. [wikipedia] -
4 images
[Nebulae]