A vast, spherical region surrounding the disk. It contains sparse populations of old stars, globular clusters, and a significant amount of dark matter.
: By analyzing metallicity gradients , astronomers can distinguish between "old" metal-poor stars in the halo (over 10 billion years old) and "younger" metal-rich stars in the disk. 3. The Core and the Future galactic astronomy pdf
, where stellar rotation speeds remain constant regardless of radius, indicating a much larger mass distribution than what is visible. ETH Zürich In-Depth Scientific PDFs A vast, spherical region surrounding the disk
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Galactic astronomy involves a range of key concepts, including:
Our Milky Way is not a static object but a survivor. Through a field known as , scientists trace the chemical "fingerprints" of stars to reconstruct the Galaxy's past.
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