... measurable parallax. Later he employed the same method with the comets of 157 7, 158 0, 158 2, 158 5, 159 0, 159 3, and 159 6, and proved that they too had no measurable parallax and must be very distant.The ... writing.His successors, Anaximander (610 -54 7 B.C.) and Anaximenes (55 0-4 75 B.C.), held absurd notions about the sun, moon, and stars, while Heraclitus (54 0 -50 0 B.C.) supposed that the stars were ... agreed with Eratosthenes. He altered the length of the tropical year from 3 65 days, 6 hours to 3 65 days, 5 hours, 53 minutes—still four minutes too much. He measured the equation of time and...