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Earliest galaxies found 'on our cosmic doorstep'

JacksinPA

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https://www.bbc.com/news/science-environment-45198764

Some of the earliest galaxies to form in the Universe are sitting on our cosmic doorstep, according to a study.

These faint objects close to the Milky Way could be more than 13 billion years old, researchers from the universities of Durham and Harvard explain.

They formed upwards of a hundred million years after the Big Bang and contained some of the first stars to light up the cosmos.
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Astrophysics is fun. Always something new.
 
How do these folk arrive at their numbers? 13 billion/ 100 million......is there carbon dating for these things?
 
How do these folk arrive at their numbers? 13 billion/ 100 million......is there carbon dating for these things?
A method called parallax is used to determine the distances to stars and nearby galaxies.

In distances where galaxies are too distant to have a visible star, type Ia supernova are used instead.
parallax.jpg

How Are Distances to Stars and Galaxies Calculated?
 



Alvin was from Tennessee......close enough.


One thing that stands out in that video is how lean everybody was. My, my we have come a long way.
 
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