-- card: 5587 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2623
-- name: 


-- part contents for background part 30
----- text -----
12

-- part contents for background part 31
----- text -----
6

-- part contents for background part 32
----- text -----
8

-- part contents for background part 13
----- text -----
The 3°K background radiation comes from

-- part contents for background part 14
----- text -----
the combined radiation of all the distant galaxies

-- part contents for background part 15
----- text -----
the radiation from distant stars with effective temperatures of 3000K

-- part contents for background part 16
----- text -----
the time when radiation and gas decoupled in the early universe

-- part contents for background part 17
----- text -----
the time when the universe was only a few seconds old

-- part contents for background part 27
----- text -----
The 3°K background originates at the time when the universe became transparent to light.

-- part contents for background part 25
----- text -----
3

-- part contents for background part 40
----- text -----
false