News for hackers. Stuff that matters.

A comment on The James Webb Space Telescope is finding too many early galaxies. Parent comment

Re:The James Webb Space Telescope is finding too many early ... by feoren on Thursday January 12, 2023 @04:10PM (#34360300)
Not an expert here but it sounds like you might be describing the Cosmic Microwave Background. This is basically the remnant of the early opaque plasma cloud that filled the entire universe. As we look far away/back in time, the photons reaching us have redshifted due to the expansion of the universe. That's why these originally extremely high-energy photons are now just low-energy microwaves. The "background", 0 seconds after the Big Bang, is in all directions, and presents as the Cosmic Microwave Background. Or so I understand.

https://en.wikipedia.org/wiki/Cosmic_microwave_background

[ Parent | on HN ]
Re:The James Webb Space Telescope is finding too many early ... by Pxtl on Thursday January 12, 2023 @04:19PM (#34360382)
There's always a relevant xkcd for every science question, and in this case it's one of the first ones:

https://xkcd.com/54/

[ Parent | on HN ]
Re:The James Webb Space Telescope is finding too many early ... by limbicsystem on Thursday January 12, 2023 @04:29PM (#34360496)
But oddly the most recent one as well https://xkcd.com/2723
[ Parent | on HN ]
Re:The James Webb Space Telescope is finding too many early ... by yreg on Thursday January 12, 2023 @07:51PM (#34362529)
It's incredible how Randall seems to be able to come up with an endless number of fun ideas even after all these years.
[ Parent | on HN ]