Astronomers
Eratosthenes
(First Person to Calculate the Circumference of the Earth and Earth's Axial Tilt)
Tycho Brahe
(16th Century Danish Astronomer Who is Known for His Accurate and Comprehensive Astronomical Observations)
Johannes Kepler
(Astronomer Best Known for his Laws of Plantery Motion)
Nicolaus Copernicus
(Polish Astronomer Who Proposed That the Earth Revolves Around the Sun)
Aryabhata
(5th & 6th Century Indian Mathematician and Astronomer who Calculated the Value of Pi)
Neil deGrasse Tyson
(American Astrophysicist, Planetary Scientist and Science Communicator)