-- card: 11096 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2623
-- name: 


-- part contents for background part 30
----- text -----
93

-- part contents for background part 31
----- text -----
28

-- part contents for background part 32
----- text -----
29

-- part contents for background part 13
----- text -----
The most important source of energy generation in stars is

-- part contents for background part 14
----- text -----
gravitational contraction

-- part contents for background part 15
----- text -----
ionization energy

-- part contents for background part 16
----- text -----
thermonuclear reactions 

-- part contents for background part 17
----- text -----
infall of meteors

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

-- part contents for background part 38
----- text -----
false