Stellar Classification, Beyond Universe Wiki
King Dedede - WiKirby: it's a wiki, about Kirby!
White dwarf - Wikipedia
Asymptotic giant branch - Wikipedia
File:Stellar evolution L vs T.png - Wikipedia
Stellar classification - Wikipedia
Scientific method - Wikipedia
Observable universe - Wikipedia
upload.wikimedia.org/wikipedia/commons/thumb/a/aa/
1.: Stellar evolution (not to scale). Figure taken from Earth Blog [2013].
Stellar Evolution Demystified
Geologic time scale - Wikipedia