Monday, May 15, 2017

Gemini Observatory tracks distant star cluster with adaptive optics

05/15/2017 12:19 PM EDT

Gemini Multi-Object Spectrograph (GMOS-South) of the Pyxis field

Researchers combine images from NSF's Gemini South's wide-field adaptive optics system with data from the Hubble Space Telescope to determine the proper motion of a distant cluster of stars. The observations, the first to use ground-based adaptive optics to precisely measure the motion of a cluster at such a large distance, allowed astronomers to set a lower limit for the mass of our Milky Way while providing clues about the cluster's origin.

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Gemini Observatory

This is an NSF News From the Field item.

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