An unprecedented study revealed more than 3,300 million celestial bodies in the Milky Way


Contains Milky Way Over hundreds of billions of stars, bright star-forming regions and towering dark clouds of dust and gas.

Photographing these objects and cataloging them for study is a daunting task, but the recently released set of astronomical data, known as the second batch of Data from the Dark Energy Camera Level Survey (DECaPS2), It revealed a staggering number of these objects in “unprecedented detail”.

The data was taken thanks to NSF’s Cerro Tololo Pan American Observatory in Chile. It was a job that took two years to complete. the details

I identified the DECaPS2 study, which took two years to complete and produced More than 10 terabytes of data from 21,400 single exposures near to 3.32 billion objects It is arguably the largest catalog of its kind compiled to date, according to a statement.

This unprecedented collection was captured by a tool Dark Energy Camera (DECam) on me Victor M Blanco Telescope affiliate Cerro Tololo Inter-American Observatory (CTIO).) with a length of 4 meters, which is a affiliate program NOIRLab NSF affiliate. CTIO is a constellation of Astronomical telescopes International lies at the top of Ciro Tololo in Chile, on 2200 meters high.

CTIO’s elevated vantage point provides astronomers with an unparalleled view of the southern celestial hemisphere, allowing DECam to capture South Galactic Level With such details.

Our galaxy is inhabited by hundreds of billions of stars, a large number of star birth areas and huge clouds of gas and dust (Reuters)

DECaPS2 is a plane survey of the Milky Way as seen from the southern sky taken optical and near infrared wavelengths. The first DECaPS data set was published in 2017, and with the addition of the new edition of the data, the study now covers 6.5% of the night sky and stretch on An amazing longitude of 130 degrees. Although it may sound modest, it is equalizing 13,000 times the angular area of ​​the full moon.


The DECaPS2 dataset is available to the entire scientific community and is hosted at Astronomical Data Lab affiliate for NOIRLab , which is part of the Center for Community Data and Science. The Ancient Survey, World Telescope, and Aladdin viewer allow interactive access to images via a web browser.

The catalog took two years to complete and yielded more than 10 terabytes of data from 21,400 individual exposures of the southern sky (NOIRLab from NSF)

Most of the stars are found and dust in the Milky Way in pinch it – tape the shining which runs along the image that precedes these words – where they are spiral arms. This abundance of stars and dust makes for beautiful images, but it also makes it difficult to observe the galactic plane.

The dark tendrils of dust that appear throughout the image absorb starlight and completely block out the faint stars, and light from diffuse nebulae interferes with any attempt to measure the brightness of individual objects. Another problem is the large number of stars, which can overlap in the image and make it difficult to separate individual stars from their neighbours.

Despite the difficulties, astronomers have ventured into the galactic plane to better understand the Milky Way. By observing at near-infrared wavelengths, they were able to Vision Lots of light absorbing dust.

The researchers also used An innovative way to process data It allowed them to better predict the background behind each star. This helped mitigate the effects of crowded nebulae and starfields in such large astrophotographs, ensuring that the final catalog of processed data would be more accurate.

Source / with information from Europa Press



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