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Challenges of Mapping the Milky Way

Mapping the Milky Way, especially its dark matter halo, is challenging due to our position inside the galaxy.

A team of astronomers used Cepheid Variable stars and data from Gaia to map the Milky Way's dark matter halo.

Recent Study and Findings

The study, published in *Nature Astronomy*, was led by the University of Chinese Academy of Sciences and other prominent institutions.

Researchers introduced an innovative method to measure the precession rate of the Milky Way’s disk warp.

The study revealed that the dark matter halo of the Milky Way is slightly oblate and rotates backward at zero. pont twelve degrees per million years.

Dark Matter Insights

Dark matter makes up about twenty seven percent of the universe’s mass-energy and is detectable only through its gravitational effects.

Role of Cepheid Variable Stars

Cepheid Variable stars, which have a pulsation period related to their intrinsic brightness, were crucial for measuring distances and mapping the halo.
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By analyzing two thiusand and six hundred Cepheid variable stars, the team uncovered important details about the Milky Way’s structure and dark matter distribution.

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