| A | B |
|---|
| Aristotle | 1st to state Sun & Moon orbit Earth |
| Ptolemy1 | termed word "planet" from wandering star |
| Ptolemy2 | Used EPICYCLES to explain retrograde motion |
| Copernicus1 | Wrote about heliocentric view on deathbed |
| Copernicus2 | Considered "Father of Modern Astronomy" |
| Galileo1 | Placed under house arrest for heliocentric views |
| Galileo2 | Studied moons of Jupiter and sunspots |
| Kepler1 | Apprentice to Brahe & inherited his notes |
| Kepler2 | Developed 3 laws of planetary motion |
| Newton1 | Defined gravity to explain orbits |
| Newton2 | Invented reflecting telescope |
| Doppler | Red shifted star spectra means going away |
| Einstein | Theory fo Relativity helps to explain Black Holes |
| Cannon1 | Classified stars |
| Cannon2 | Variable star research |
| Flemming | Discovered many gas nebulae |
| Tombaugh | Discovered Pluto |
| Hubble1 | 1st to discover other galaxies |
| Hubble2 | Calculated rate of expansion of universe |
| Hawking | Disabled astrophysicist studying Black Holes |
| Brahe1 | Developed quadrant system for observations |
| Brahe2 | Claimed other planets orbit Sun and that whole system orbits Earth |
