APOD: 2019 November 16 - The Star Streams of NGC 5907

Good Afternoon, Maj William W. 'Bill' Price and thank you for this tantalizing image of NGC 5907! There aren't too many Video's on this particular Galaxy, but one caught my eye as it is a scientific simulation of NGC 5907 forming.

"NGC 5907 is a spiral galaxy lying in the constellation Draco and shows extraordinary large loops and currents of stars in its surrounding halo. According to researchers, it could have been formed through a gigantic collision of galaxies, 8 to 9 billion years ago. Six scientists of the Observatoire de Paris, CNRS, Chinese Academy of Sciences, National Astronomical Observatories of China and Aix-Marseille Université proposed this scenario on the basis of simulations with 200,000 to 6 million particles. These up-to-date calculations, that include gas hydrodynamics, are able to reproduce in a film the formation of NGC 5907 and its surrounding gigantic loops of matter. Results appeared on the cover of the online edition of Astronomy and Astrophysics, the 13 February 2012. They provide an important test for cosmological scenarios." https://youtu.be/8giaLy9UujM
credit: GEPI, Observatoire de Paris / CNRS / Pythéas / NAOC




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Wow!!! Good morning Bill!

Good Saturday, November 16, 2019 morning my friend Maj William W. 'Bill' Price and thank you for posting the NASA Astronomy Picture of the Day (APOD) is titled "The Star Streams of NGC 5907."
Image: The Star Streams of NGC 5907 - Image Credit & Copyright - R Jay Gabany (Blackbird Observatory) - collaboration; D.Martinez-Delgado(IAC, MPIA),
"Explanation: Grand tidal streams of stars seem to surround galaxy NGC 5907. The arcing structures form tenuous loops extending more than 150,000 light-years from the narrow, edge-on spiral, also known as the Splinter or Knife Edge Galaxy. Recorded only in very deep exposures, the streams likely represent the ghostly trail of a dwarf galaxy - debris left along the orbit of a smaller satellite galaxy that was gradually torn apart and merged with NGC 5907 over four billion years ago. Ultimately this remarkable discovery image, from a small robotic observatory in New Mexico, supports the cosmological scenario in which large spiral galaxies, including our own Milky Way, were formed by the accretion of smaller ones. NGC 5907 lies about 40 million light-years distant in the northern constellation Draco."

Jeff Lynne - Stream of Stars
https://www.youtube.com/watch?v=AnAS7VodcIM

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