Jan 29, 2016
The Milky Way may be dead or dying, but help is on the way
Our galaxy might be running out of fuel, but scientists say that a shipment is on the way in the form of a previously exiled part of the Milky Way.
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The Milky Way may be dead or dying, but help is on the way
Our galaxy might be running out of fuel, but scientists say that a shipment is on the way in the form of a previously exiled part of the Milky Way.
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An article published in "The Astrophysical Journal Letters" describes a research about the so-called ""Smith Cloud" (or "Smith's Cloud"). It's a giant cloud of hydrogen which is currently outside of the Milky Way but is heading towards our galaxy at about 1.1 million km/h (almost 700,000 mph). Observations made using the Hubble Space Telescope suggest that it was ejected from the Milky Way galaxy about 70 million years ago and now is coming back.
Magnetic 'Force Field' Shields Giant Gas Cloud During Collision With Milky Way
Oct. 31, 2013 — Doom may be averted for the Smith Cloud, a gigantic streamer of hydrogen gas that is on a collision course with the Milky Way Galaxy. Astronomers using the National Science Foundation's Karl G. Jansky Very Large Array (VLA) and Robert C. Byrd Green Bank Telescope (GBT) have discovered a magnetic field deep in the cloud's interior, which may protect it during its meteoric plunge into the disk of our Galaxy.
This discovery could help explain how so-called high velocity clouds (HVCs) remain mostly intact during their mergers with the disks of galaxies, where they would provide fresh fuel for a new generation of stars.
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Magnetically Shielded Giant Cloud to Collide with Milky Way Galaxy in 30 Million Years
Doom may be averted for the Smith Cloud, a gigantic streamer of hydrogen gas that is on a collision course with the Milky Way Galaxy. Astronomers using the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) and Robert C. Byrd Green Bank Telescope (GBT) have discovered a magnetic field deep in the cloud’s interior, which may protect it during its meteoric plunge into the disk of our Galaxy.
This discovery could help explain how so-called high velocity clouds (HVCs) remain mostly intact during their mergers with the disks of galaxies, where they would provide fresh fuel for a new generation of stars.
Currently, the Smith Cloud is hurtling toward the Milky Way at more than 150 miles per second and is predicted to impact in approximately 30 million years. When it does, astronomers believe, it will set off a spectacular burst of star formation. But first, it has to survive careening through the halo, or atmosphere, of hot ionized gas surrounding the Milky Way.
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Image credit: Bill Saxton / NRAO / AUI / NSF.