Timeline of Astronomy

This ancient Greek philosopher was the first to propose a heliocentric model for our solar system.

• Herodotus

• Plato

• Aristarchus

• Socrates

The main stones at Stonehenge were laid in place in approximately what year?

• 1000 BC

• 1066 AD

• 2500 BC

• 1492 AD

Three important types of telescopes -- refracting (lens), reflecting (mirror), and radio -- were developed by these scientists in this order:

• Lippershey, Newton, then Reber

• Newton, Reber, then Lippershey

• Reber, Lippershey, then Newton

• Newton, Lippershey, then Reber

He discovered the four moons of Jupiter, craters on the Moon, and the Milky Way Galaxy.

• Da Vinci

• Kepler

• Galileo

• Aristotle

He was the first person in space.

• Boris Badenov

• Neil Armstrong

• John Glenn

• Yuri Gagarin

This scientist was the first to discover that there were galaxies other than the Milky Way.

• Stephen Hawking

• Albert Einstein

• Edwin Hubble

• Percival Lowell

The first people to walk on the Moon are:

• Yuri Gagarin and Boris Badenov

• Neil Armstrong and Buzz Aldrin

• James Watson and Francis Crick

• Gus Grissom and Alan Shepard

Johannes Kepler proposed his three laws of planetary motion at the same time this scientist was studying the solar system.

• Francis Bacon

• Max Plank

• Issac Newton

• Galileo Galilei