Famous Astronomers & Astronauts

Famous Astronomers & Astronauts

Isaac Newton

Galileo Galilei

Neil Armstrong

Ptolemy

Stephen Hawking

c. 100 c.e. to 170 c.e.

1642-1726

*Laws of planetary motion

1930-2012

*first person to walk on the moon

*famous American astronaut

* Famous for geo-centric model of the

universe, known as the Ptolemaic system.

*Influenced medieval astronomers.

1564-1642

*"father of modern observational astronomy"

*supported heliocentric model of solar system & was accused of heresy for this.

1942-

*black holes emit radiation

*quantum mechanics

*wrote A Brief History of Time

Carl Sagan

Neil deGrasse Tyson

1934-1996

1958-

Edwin Hubble

Johannes Kepler

Nicolaus Copernicus

*scientific research of extraterrestrial life

*famous for TV show, Cosmos

*researches astrophysics

1473-1543

*Proposed that planets have a fixed point--the Sun--

a.k.a. the heliocentric model

*The Earth revolves on its own axis

1571-1630

*laws for planetary motions

*Newton based his work on universal gravitation on Kepler's writing

1889-1953

*extragalactic astronomy (astronomy

outside of the Milky Way)

*Hubble's Law

*Hubble Space Telescope named after him.

*famous science communicator