{"id":797345,"date":"2025-07-18T06:56:07","date_gmt":"2025-07-18T11:56:07","guid":{"rendered":"http:\/\/spaceweekly.com\/?p=797345"},"modified":"2025-07-18T06:56:07","modified_gmt":"2025-07-18T11:56:07","slug":"a-hidden-molecular-cloud-near-our-milky-ways-center","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=797345","title":{"rendered":"A hidden molecular cloud near our Milky Way\u2019s center"},"content":{"rendered":"
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\nArtist\u2019s concept of the hidden molecular cloud in our Milky Way. Scientists are calling this region of gas and dust the Midpoint Cloud. Image via NSF\/ AUI\/ NSF NRAO\/ P. Vosteen.<\/figcaption><\/figure>\n
A hidden molecular cloud in our Milky Way<\/h3>\n
Our Milky Way galaxy consists of gas, dust and billions of stars. They trace out its spiral arms and form its central bulge, while a supermassive black hole resides at our galaxy\u2019s center. But on July 16, 2025, astronomers from the National Science Foundation\u2019s National Radio Astronomy Observatory said they\u2019ve found a giant molecular cloud \u2013 a gaseous region of star birth made mostly of molecular hydrogen \u2013 that was previously hidden from our view. The molecular cloud lies at a transition zone between the quieter galactic disk and the more extreme central region.<\/p>\n
Lead author Natalie Butterfield of the NSF National Radio Astronomy Observatory said: <\/p>\n
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One of the big discoveries of the paper was the giant molecular cloud itself. No one had any idea this cloud existed until we looked at this location in the sky and found the dense gas. Through measurements of the size, mass and density, we confirmed this was a giant molecular cloud.<\/p>\n<\/blockquote>\n
The Midpoint Cloud<\/h3>\n
The scientists have dubbed their new discovery the Midpoint Cloud. That\u2019s because it was found at the midpoint of the dust lanes in the central bar in our galaxy. This active region is likely the location of new star birth. Butterfield described the molecular cloud in detail: <\/p>\n
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These dust lanes are like hidden rivers of gas and dust that are carrying material into the center of our galaxy. The Midpoint cloud is a place where material from the galaxy\u2019s disk is transitioning into the more extreme environment of the galactic center. It provides a unique opportunity to study the initial gas conditions before accumulating in the center of our galaxy.<\/p>\n<\/blockquote>\n
The astronomers used the Green Bank Telescope in West Virginia to make their discovery. They looked at molecules such as ammonia and cyanobutadiyne (which has hydrogen, carbon and nitrogen atoms). These molecules help trace out the dense gas. <\/p>\n
The researchers said the Midpoint Cloud is likely a \u201ccrucial link\u201d in how material flows to the center of the galaxy. Studying this cloud might reveal the process of galaxies building their central structures. And it should show how stars form in extreme environments.<\/p>\nThis depiction of the Milky Way shows the location of the hidden molecular cloud that astronomers have named Midpoint Cloud. Image via NRAO\/ Nick Risinger.<\/figcaption><\/figure>\n
Other discoveries<\/h3>\n
The researchers outlined other discoveries in their paper. They found a new maser, which stands for microwave amplification by stimulated emission of radiation<\/em> (like laser but for microwave light). The maser could be a sign of star formation.<\/p>\n
Other signs of star birth include clumps of gas and dust that the astronomers said might be forming new stars. But some of the new stars are eating away at other clumps. For example, the researchers named one clump Knot E<\/em>. It appears this dense little knot of dust is eroding due to surrounding stars. <\/p>\n
And the cloud is home to not just star birth, but stars dying as well. Researchers found a shell that\u2019s likely the remains of a dying star. In general, there\u2019s a lot going on in this chaotic cloud. Co-author Larry Morgan of the NSF Green Bank Observatory said: <\/p>\n
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Star formation in galactic bars is a bit of a puzzle. The strong forces in these regions can actually suppress star formation. However, the leading edges of these bars, such as where the Midpoint is located, can accumulate dense gas and trigger new star formation.<\/p>\n<\/blockquote>\nThis image points out the location of the shell (likely from a dying star) and maser in the Midpoint Cloud. Image via NSF\/ AUI\/ NSF NRAO\/ P. Vosteen.<\/figcaption><\/figure>\n
Bottom line: Researchers have discovered a giant molecular cloud that has been hiding in our Milky Way galaxy near its central bar. The area is likely a region of star birth.<\/p>\n
Source: Discovery of a Giant Molecular Cloud at the Midpoint of the Galactic Bar Dust Lanes: M4.7\u20130.8<\/p>\n
Via NRAO<\/p>\n
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Kelly Kizer Whitt<\/h4>\n
View Articles\n <\/p><\/div>\n
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About the Author:<\/h6>\n
Kelly Kizer Whitt – EarthSky\u2019s nature and travel vlogger on YouTube – writes and edits some of the most fascinating stories at EarthSky.org. She’s been writing about science, with a focus on astronomy, for decades. She began her career at Astronomy Magazine and made regular contributions to other outlets, including AstronomyToday and the Sierra Club. She has nine published books, including a children’s picture book, Solar System Forecast, and a young adult dystopian novel, A Different Sky.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n
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