Madau-Lilly star formation history (1996)
Two groups, led by Piero Madau and Simon Lilly, independently measured how the universe's star formation rate changed over cosmic time. They found it peaked about 10 billion years ago and has declined steeply since.
Established the 'Madau plot,' a standard reference curve for galaxy evolution used in essentially every astronomy textbook since.
Set the question this new FAST/DESI study finally tackles: what actually ends star formation in the universe?
The new result measures the same decline in its most recent 4.5 billion years and tests the leading explanation for it, fuel exhaustion.
