Astronomers Discover Milky Way Galaxy’s Most-Distant Stars

[Epoch-Times-Bot]

Astronomers Discover Milky Way Galaxy's Most-Distant Stars

WASHINGTON—Astronomers have detected in the stellar halo that represents the Milky Way’s outer limits a group of stars more distant from Earth than any known within our own galaxy—almost halfway to a neighboring galaxy.
The researchers said these 208 stars inhabit the most remote reaches of the Milky Way’s halo, a spherical stellar cloud dominated by the mysterious invisible substance called dark matter that makes itself known only through its gravitational influence. The furthest of them is 1.08 million light years from Earth. A light year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km).
These stars, spotted using the Canada-France-Hawaii Telescope on Hawaii’s Mauna Kea mountain, are part of a category of stars called RR Lyrae that are relatively low mass and typically have low abundances of elements heavier than hydrogen and helium. The most distant one appears to have a mass about 70 percent that of our sun. No other Milky Way stars have been confidently measured farther away than these....

Source: Astronomers Discover Milky Way Galaxy's Most-Distant Stars

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