Astronomers discover galaxies spin like clockwork
Astronomers have discovered that all galaxies rotate once every billion years, no matter how big they are.
Read more at: https://phys.org/news/2018-03-astronomers-galaxies-clockwork.html#jCp
Tau.Neutrino said:
Astronomers discover galaxies spin like clockworkAstronomers have discovered that all galaxies rotate once every billion years, no matter how big they are.
Read more at: https://phys.org/news/2018-03-astronomers-galaxies-clockwork.html#jCp
Huh. I wonder why?
Michael V said:
a life seconds wondering, tick tock tick tock
Tau.Neutrino said:
Astronomers discover galaxies spin like clockworkAstronomers have discovered that all galaxies rotate once every billion years, no matter how big they are.
Read more at: https://phys.org/news/2018-03-astronomers-galaxies-clockwork.html#jCp
Huh. I wonder why?
roughbarked said:
Michael V said:a life seconds wondering, tick tock tick tock
Tau.Neutrino said:
Astronomers discover galaxies spin like clockworkAstronomers have discovered that all galaxies rotate once every billion years, no matter how big they are.
Read more at: https://phys.org/news/2018-03-astronomers-galaxies-clockwork.html#jCp
Huh. I wonder why?
I did choose wondering, though I was aware the word was plundering.
Michael V said:
Tau.Neutrino said:
Astronomers discover galaxies spin like clockworkAstronomers have discovered that all galaxies rotate once every billion years, no matter how big they are.
Read more at: https://phys.org/news/2018-03-astronomers-galaxies-clockwork.html#jCp
Huh. I wonder why?
Agree, and since galaxy rotation has been studied intensively since the Tully-Fisher relationship was found in 1977, why hasn’t this been observed before?
The Tully-Fisher relationship is a relationship between galaxy rotation speed and galaxy mass, as shown below.
If I read this new news right, it’s saying that lenticular galaxies with a given mass have a smaller diameter than spiral galaxies, which makes sense.
The relationship between galaxy mass and galaxy size has been studied even longer, since at least 1966. eg.
All sounds very interesting.
I wonder how much non-swiss-clockness they are talking about.
But first question: what on earth are the mas units in the velocity v galactic mass graph?
Does an increasing negative number indicate increasing mass?
mollwollfumble said:
Michael V said:
Tau.Neutrino said:
Astronomers discover galaxies spin like clockworkAstronomers have discovered that all galaxies rotate once every billion years, no matter how big they are.
Read more at: https://phys.org/news/2018-03-astronomers-galaxies-clockwork.html#jCp
Huh. I wonder why?
Agree, and since galaxy rotation has been studied intensively since the Tully-Fisher relationship was found in 1977, why hasn’t this been observed before?
The Tully-Fisher relationship is a relationship between galaxy rotation speed and galaxy mass, as shown below.
If I read this new news right, it’s saying that lenticular galaxies with a given mass have a smaller diameter than spiral galaxies, which makes sense.
The Rev Dodgson said:
All sounds very interesting.I wonder how much non-swiss-clockness they are talking about.
But first question: what on earth are the mas units in the velocity v galactic mass graph?
Does an increasing negative number indicate increasing mass?
Mass is inferred from magnitude of brightness. I read that as Absolute Magnitude. The sun has absolute magnitude 4.83. The Milky Way has absolute magnitude -21. So yes, increasing negative magnitude indicates increasing mass.
