I Cosmic Microwave Background Surveys

AI Thread Summary
The discussion focuses on the Cosmic Microwave Background (CMB) and its relation to the Milky Way. It questions whether the Milky Way is a 'closed' system and if the surveys are based on data from the visible Universe or limited to the Milky Way. The CMB is identified as a universal phenomenon, originating from the hot plasma of the Big Bang and now located approximately 45 billion light years away. This indicates that the CMB encompasses regions far beyond the Milky Way. The conversation clarifies that the CMB is not confined to the Milky Way, emphasizing its omnipresence in the universe.
Martyn Arthur
Messages
116
Reaction score
20
TL;DR Summary
Is the survey Universally representative?
If I understand correctly, by reference say here, the results seem to relate to a survey of the Milky Way.
1. Is the Milky Way a 'closed' system?
2. Whether or not, were the surveys based on data from the visible Universe, or restricted in all or part to the data form 'within' the Milky Way.
 
Astronomy news on Phys.org
Apologies, I intended to post only the link, not realizing it would start the video off!
 
The CMB is everywhere in the universe. The radiation comes from the hot plasma of the Big Bang and has been travelling since then. The stuff that emitted the radiation we now see as the CMB is currently around 45 billion light years away, far beyond the Milky Way.
 
Reply
  • Like
Likes collinsmark
That is very clear thank you
martyn
 

Thread 'Venus and Jupiter Conjunction'

Today at about 4:30 am I saw the conjunction of Venus and Jupiter, where they were about the width of the full moon, or one half degree apart. Did anyone else see it? Edit: The moon is 2,200 miles in diameter and at a distance of 240,000 miles. Thereby it subtends an angle in radians of 2,200/240,000=.01 (approximately). With pi radians being 180 degrees, one radian is 57.3 degrees, so that .01 radians is about .50 degrees (angle subtended by the moon). (.57 to be more exact, but with...
View full post »

Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
View full post »

Similar threads

A Could gamma-ray bursts have an intragalactic origin?
Replies
29
Views
320
B Cosmic Microwave Background Stage 4 Cancelled for now
Replies
4
Views
299
I Some questions about Cosmic Microwave Background radiation
Replies
13
Views
6K
How many degrees of view is cosmic microwave background?
Replies
3
Views
2K
B Are There Any Kardeshev 2.0 Civilizations in the Milky Way?
Replies
19
Views
3K
Hawking radiation and cosmic microwave background radiation
Replies
5
Views
7K
I Blackbody radiation and the cosmic microwave background
Replies
29
Views
4K
I How Does a CMB Photon Travel Through Expanding Universe?
Replies
39
Views
5K
B Questions about the cosmic microwave background radition and its discovery
Replies
4
Views
4K
Energy from cosmic microwave background
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top