Uploaded April 2016 | Updated September 2026, 1 week ago
Episode 3 of 5
Check us out on iTunes! testtube.com/podcast
Please Subscribe! testu.be/1FjtHn5
While we don't really know where galaxies come from or how they form, we have several theories. Funnily enough, all of them seem to involve the mysterious dark matter.
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Previous Episode:
How Nuclear Fusion Holds Our Solar System Together: youtu.be/vEb19I1HixQ?list=PLwwOk5fvpuuLUsdHbX81DIAsiBqQrilX_
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Sources:
Monolithic Collapse:
https://astronomy.swin.edu.au/cosmos/M/Monolithic+Collapse
“The term ‘monolithic collapse’ is often used as an alternative to primordial collapse. In this theory for galaxy formation, all galaxies were formed at the same time through the collapse of a cloud of primordial gas."
Secular Evolution:
http://astronomy.swin.edu.au/cosmos/S/Secular+Evolution
“Secular evolution is defined as slow, steady evolution. In galaxies, such evolution is either the result of long-term interactions between the galaxy and its environment (such as gas accretion or galaxy harassment), or it is induced by internal processes such as the actions of spiral arms or bars."
How Did The Galaxies Form?:
http://origins.stsci.edu/faq/galaxies.html
“On a clear, moonless night, one can often see a hazy, luminous band stretching across the sky. The ancients devised many fanciful myths to account for this 'milky way.'"
Where Do Galaxies Come From?:
slate.com/articles/health_and_science/mysteries_of_the_universe/2014/02/galaxy_formation_dark_matter_ellipticals_spirals_harassment_stripping_strangulation.html
“We live in a galaxy, the Milky Way, and when we peer out with our augmented telescopic eyes, we see galaxies everywhere we look. We see big ones, small ones, richly detailed spirals, and bulbous ellipticals."
How Galaxies Work:
science.howstuffworks.com/dictionary/astronomy-terms/galaxy3.htm
“We really don't know how various galaxies formed and took the many shapes that we see today. But we do have some ideas about their origins and evolution."
Galaxies Gone Wild!:
spacetelescope.org/news/heic0810
“Fifty nine new images of colliding galaxies make up the largest collection of Hubble images ever released together."
+ + + + + + + +
DNews Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topics they love. Host Trace Dominguez digs beyond the usual scope to deliver details, developments and opinions on advanced topics like AI, string theory and Mars exploration. DNews Plus is also offered as an audio podcast on iTunes.
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Trace Dominguez on Twitter twitter.com/TraceDominguez
DNews on Facebook facebook.com/discoverynews
DNews on Twitter twitter.com/DNews
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Episode 3 of 5
Check us out on iTunes! testtube.com/podcast
Please Subscribe! testu.be/1FjtHn5
While we don't really know where galaxies come from or how they form, we have several theories. Funnily enough, all of them seem to involve the mysterious dark matter.
+ + + + + + + +
Previous Episode:
How Nuclear Fusion Holds Our Solar System Together: youtu.be/vEb19I1HixQ?list=PLwwOk5fvpuuLUsdHbX81DIAsiBqQrilX_
+ + + + + + + +
Sources:
Monolithic Collapse:
https://astronomy.swin.edu.au/cosmos/M/Monolithic+Collapse
“The term ‘monolithic collapse’ is often used as an alternative to primordial collapse. In this theory for galaxy formation, all galaxies were formed at the same time through the collapse of a cloud of primordial gas."
Secular Evolution:
http://astronomy.swin.edu.au/cosmos/S/Secular+Evolution
“Secular evolution is defined as slow, steady evolution. In galaxies, such evolution is either the result of long-term interactions between the galaxy and its environment (such as gas accretion or galaxy harassment), or it is induced by internal processes such as the actions of spiral arms or bars."
How Did The Galaxies Form?:
http://origins.stsci.edu/faq/galaxies.html
“On a clear, moonless night, one can often see a hazy, luminous band stretching across the sky. The ancients devised many fanciful myths to account for this 'milky way.'"
Where Do Galaxies Come From?:
slate.com/articles/health_and_science/mysteries_of_the_universe/2014/02/galaxy_formation_dark_matter_ellipticals_spirals_harassment_stripping_strangulation.html
“We live in a galaxy, the Milky Way, and when we peer out with our augmented telescopic eyes, we see galaxies everywhere we look. We see big ones, small ones, richly detailed spirals, and bulbous ellipticals."
How Galaxies Work:
science.howstuffworks.com/dictionary/astronomy-terms/galaxy3.htm
“We really don't know how various galaxies formed and took the many shapes that we see today. But we do have some ideas about their origins and evolution."
Galaxies Gone Wild!:
spacetelescope.org/news/heic0810
“Fifty nine new images of colliding galaxies make up the largest collection of Hubble images ever released together."
+ + + + + + + +
DNews Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topics they love. Host Trace Dominguez digs beyond the usual scope to deliver details, developments and opinions on advanced topics like AI, string theory and Mars exploration. DNews Plus is also offered as an audio podcast on iTunes.
+ + + + + + + +
Trace Dominguez on Twitter twitter.com/TraceDominguez
DNews on Facebook facebook.com/discoverynews
DNews on Twitter twitter.com/DNews
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