How many letters does the top answer for “physical cosmology scientist” have?

The most common answer is gamow (5 letters).

Crossword clue: physical cosmology scientist

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

gamow 5 letters wd-fact-v3

United States physicist (born in Russia) who was a proponent of the big-bang theory and who did research in radioactivit

guth 4 letters wd-fact-v3

cosmology scientist 67% similar → barrow, davies, hawking

physical geography scientist 50% similar → grummgrzhimaylo, maury

physical science scientist 50% similar → grassi