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Bad Astronomy | Universe expansion measurements show large discrepancies


Or, possibly, there’s a problem with how we’re observing it. Either way, something’s fishy.
In a nutshell, the Universe is expanding. There’s a whole bunch of different ways to measure that expansion. The good news is these methods all get
roughly the same number for it. The bad news is they don’t get
exactly the same number. One group of methods gets one number, and another group gets another number.
This discrepancy has been around awhile, and it’s not getting better. In fact, it’s getting worse (as astronomers like to say, there’s a growing tension between the methods). The big difference between the two groups is that one set of methods looks at relatively nearby things in the Universe, and the other looks at very distant ones. Either we’re doing something wrong, or the Universe is doing something different far away than it is near here. ....

Judy Schmidt , Edwin Hubble , Video Of Dark Energy , Big Bang , Crash Course Astronomy , Hubble Constant , Dominion Astrophysical Observatory , Atacama Cosmology Telescope , Dark Energy , Bad Astronomy , The Big Bang , ஜூடி ஶ்மிட் , எட்வின் ஹப்பிள் , காணொளி ஆஃப் இருள் ஆற்றல் , பெரியது இடி , செயலிழப்பு நிச்சயமாக வானியல் , ஹப்பிள் மாறிலி , ஆதிக்கம் வானியற்பியல் கண்காணிப்பு , இருள் ஆற்றல் , மோசமான வானியல் , தி பெரியது இடி ,

Monique Keiran: A collision of galaxies is coming - in about four billion years


Although some pointy-headed people speculated that, perhaps, some of those ­nebulous formations may be “island ­universes of their own,” that talk was ­controversial.
Even by 1917, the latest research ­suggested that the Milky Way that is, the universe was 300,000 light years across and 30,000 light years thick at its bulging centre. These dimensions exceeded any ­previous estimates by 10 times.
That was just the start. Throughout the 1920s and ’30s, the universe underwent several major changes. A series of discoveries made on the biggest, most advanced telescopes of the time, including the one here on Little Saanich Mountain, revealed that our place in the universe is not just not central, it was downright peripheral and insignificant. ....

United States , British Columbia , Edwin Hubble , John Stanley Plaskett , Jan Oort , Milky Way , Little Saanich Mountain , Dominion Astrophysical Observatory , ஒன்றுபட்டது மாநிலங்களில் , பிரிட்டிஷ் கொலம்பியா , எட்வின் ஹப்பிள் , ஜான் ஸ்டான்லி பிளாஸ்கெட் , பால் வழி , கொஞ்சம் சாணிச் மலை , ஆதிக்கம் வானியற்பியல் கண்காணிப்பு ,