Monday , September 26 2022

The Milky Way's galactic discs were uneven



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The discs, which are a collection of stars, are curved and curved.

REPUBLIKA.CO.ID, Washington – Astronomers have made the most accurate map of the Milky Way galaxy by tracking thousands of stars scattered throughout the galaxy. This card also shows Milky Way discs, which are collections of stars not flat but curved and curved.

As reported in Malay mailResearchers released a 3D map of the Milky Way on Saturday (3/8). They provide a comprehensive diagram of its structure, namely a star disk consisting of four main spiral arms and a beam-shaped core.

"For the first time, our entire galaxy, from end to end of the disk, was mapped using real and accurate distances," said Warsaw University astronomer Andrzej Udalski.

The new map has been formulated using precise measurements of the distance from the Sun to 2400 stars, called the Gap variables, scattered across the galaxy. "Chapeid is ideal for studying the Milky Way for several reasons," said Warsaw University astronomer and study co-author Dorotha Scoron.

He said the variable Cepheid are bright super-big stars and they are 100 to 10 thousand times brighter than the sun. Therefore, Cepheid can be found in the periphery of the Milky Way galaxy.

"They are also relatively young (aged) less than 400 million years old, so we can find them near their hometown," he said.

Astronomers with cepheid traces use the Warsaw Telescope located in Los Angeles, Chile. These stars pulsate periodically and can be seen through the vast galactic clouds of interstellar dust. These galactic clouds can make stars difficult to recognize.

The map shows distant flat-shaped galactic disks. The original shape is significantly curved and there is a change in thickness from one place to another, with an increase in thickness further measured from the center of the galaxy.

This disk has a diameter of 140 thousand light years. Each light year is about nine trillion kilometers.

The Milky Way galaxy began to form shortly after the Big Bang, which marked the beginning of the universe about 13.8 billion years ago. The sun, located about 26,000 light-years from supermassive black holes in the center of the galaxy, formed about 4.5 billion years ago.

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