Complex sentence: R136 is the cluster in which R136c is located and it contains 450,000 worth of solar masses and 10,000 stars, most which are massive and luminous, giving give the cluster a bluish hue.
Split into simpler sentences: R136 is the cluster in which R136c is located. It contains 450,000 worth's of solar masses and 10,000 stars, most which are massive and luminous, giving give the cluster a bluish hue.