Timeline Project by Christian https://padlet.com/carbachr0001/axagy60w1vzr6ejx Made with serendipity en-us 2020-10-15 15:40:35 UTC 2025-11-18 09:56:44 UTC hello@padlet.com Stonehenge 2800 BC carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832848950 Location: Salisbury, England
Stonehenge is the most famous prehistoric astronomical observatory]]> 2020-10-15 15:47:00 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832848950 Claudius Ptolemy 100 AD- 170 AD carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832855857 Place of birth: Alexandria, Egypt
Founder of Ptolemaic model of  the solar system
Characteristics:
-Earth at center, sun, moon, planets, and stars travel along a circular path
-Epicycles explained the backwards motion of some of the planets
-Consisted of 80 circular paths to explain the motion of all of the known celestial bodies

]]> 2020-10-15 15:48:34 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832855857 Nicolaus Copernicus 1473- 1543 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832858339 Place of birth: Torun, Poland
Founder of the Heliocentric model of the solar system
Characteristics:
-Sun is centered in the middle of the solar system. Planets and moons orbit around the sun
-Earth spins on its axis
-Moons orbit respective planets
-Retrograde motion occurs when Earth “laps” an inferior planet in the sky
-Circular orbits in the sky



]]> 2020-10-15 15:49:08 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832858339 Galileo 1564-1642 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832860651 Place of birth: Pisa, Italy
-Utilized brand new technology for his work the telescope
-Built his own telescope
Discoveries:
 -geography of the moon
-sunspots on the sun
-Jupiter’s moons
-Transit of Venus

He published his work 
and came out publicly in support of the heliocentric model of the 
solar system, which he was imprisoned for.
]]> 2020-10-15 15:49:41 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832860651 Invention and Improvement of the Telescope carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832862249 -Telescopes are like giant light collectors
-There are two types of telescopes, reflecting and refracting.
Refracting telescopes:
Refracting uses lenses to bed light from a celestial object to an observer's eye
Reflecting Telescopes: Reflecting uses mirrors to reflect the light from a celestial object to an 
observers eye
]]> 2020-10-15 15:50:05 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832862249 Hipparchus 190 BC - 120 BC carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832889138 Place of birth: Nicaea, Turkey
Hipparchus was one of the first people to correctly theorize that the Earth orbited around the Sun.


]]> 2020-10-15 15:56:22 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832889138 Brahe 1546-1601 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832902281 Place of birth: Knutstorp Manor, Sweden
-Most of his observations came before the telescope 
He used his own instruments
-Brahe kept detailed records of stars, planets, and 
other noteworthy astronomical events
-Brahe’s observations accurately identified positions of 
celestial bodies which helped in the creation of the 
laws of planetary motion
]]> 2020-10-15 15:59:23 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832902281 Kepler 1571- 1630 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832903531 Place of birth: Weil der Stadt, Germany
- Used Brahe’s records to try to find a description of planetary motion
- Created three laws of planetary motion based on Brahe’s planetary data
1st law:
The orbital paths of the planets are elliptical (not circular), with the Sun at one focus
2nd Law:
An imaginary line connecting the Sun to any planet sweeps out equal area in equal amounts 
of time
3rd law: The square of a planet's orbital period is proportional to the cube of it’s semimajor axis
]]> 2020-10-15 15:59:39 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832903531 Newton 1643-1727 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832909989 Place of birth: Woolsthorpe Manor House, United Kingdom
-Discovered gravity and the law of universal gravitation
-Acceleration due to gravity g=9.81 m/s^2
Law of inertia:
an object in motion will remain in motion unless acted on by an outside force
Newton's Law of Universal Gravitation:
Universal gravitational 
Every particle attracts every 
other particle in the universe 
with a force directly 
proportional to the product 
of their masses and inversely 
proportional to the distance 
between their centers


]]> 2020-10-15 16:01:12 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832909989 Einstein 1879-1955 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832911206 Place of birth: Ulm, Germany
-Developed the theories of special and general relativity
Special relativity:
Theory relating space and time. The observance of space and time are relative to each 
individual observer. 
General Relativity:
Theory of gravitation that explains how objects with mass warp spacetime. Massive 
objects bend space and slow down time. 
]]> 2020-10-15 16:01:30 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832911206 Hawking 1942-2018 carbachr0001 https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832911859 Place of birth: Oxford, United Kingdom
Predicted the existence of Black Holes and noted that they emit Hawking radiation

Hawking Radiation:
Electromagnetic radiation 
emitted by a black hole, due to quantum effects, causing it to lose matter. If a black hole loses 
more matter than it gains, it could shrink and eventually vanish.
]]> 2020-10-15 16:01:40 UTC https://padlet.com/carbachr0001/axagy60w1vzr6ejx/wish/832911859