Space

Hubble Learns Galactic History From Stars

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Briefings

NASA/ESA Hubble Space Telescope captured a new image of Messier 30, a globular star cluster approximately 27,500 light-years away in the constellation Capricornus. Analysis of data from three observing programs (#10775, #13297, #16298) spanning 15 years revealed diverse stellar populations, including blue stragglers, and confirmed the cluster orbits opposite to our Milky Way's rotation, suggesting it may have been captured by the galaxy in the distant past. The image combines ultraviolet, visible, and near-infrared data to study star formation and evolution.

Key points

• Messier 30 (M30) is a globular cluster located 27,500 light-years away in the constellation Capricornus.
• Hubble's three observing programs (#10775, #13297, #16298) collected data over 15 years to study M30's stellar populations and motions.

Context

Globular clusters are ancient time capsules orbiting the Milky Way's halo. M30's unique orbital direction suggests it may have been captured by our galaxy, offering insights into early galactic history.

Limitations

Image credit is ESA/Hubble and NASA. Data covers 15 years of observations. Some conclusions about M30's formation history remain speculative due to orbital direction analysis.

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