How many letters does the top answer for “wrote cosmos” have?

The most common answer is humboldt (8 letters).

Crossword clue: wrote cosmos

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

humboldt 8 letters wd-fact-v3

German naturalist who explored Central and South America and provided a comprehensive description of the physical univer

sagan 5 letters wd-fact-v3

wrote 1q84 50% similar → murakami

wrote 2666 50% similar → bolano

wrote 4 3 2 1 50% similar → auster

wrote cosmos: a personal voyage 50% similar → sagan

wrote q11368 50% similar → kernighan, ritchie

wrote q13415681 50% similar → hamill

wrote q134773 50% similar → zemeckis

wrote q1457000 50% similar → knuth