# data[].attributes.headline
3,000-2,000 BCE                  Constellations found in Mesopotamia

# data[].attributes.subject
3,000-2,000 BCE                  Constellations found in Mesopotamia

# data[].attributes.body
Fact One: The constellations that were discovered were Leo, Taurus, Scorpius, Gemini, Capricorn, and Sagittarius.

Fact Two: This discovery helped mark the yearly path of the Sun, Moon, and planets.

# data[].attributes.headline
4,900 BCE                                Goseck Circle in Germany

# data[].attributes.subject
4,900 BCE                                Goseck Circle in Germany

# data[].attributes.body
Fact One: This invention was made up of four concentric circles, a mound, and two wooden stakes.

Fact Two: The Goseck Circle is believed to be the earliest Sun observatory. It enabled people to measure the sun's path during a solar year.

# data[].attributes.headline
800 BCE                                 Indian astronomer proposes a heliocentric concept of the universe.

# data[].attributes.subject
800 BCE                                 Indian astronomer proposes a heliocentric concept of the universe.

# data[].attributes.body
Fact One: Yajnavalky's concept not only stated that the earth was round, but also that it is not the center of the universe.

Fact Two: His statement "the center of the spheres" would have deceived a lot of hate because almost everybody believed in the geocentric model.

# data[].attributes.headline
450 BCE                             Philosopher Anaxagoras suggests that the stars are suns

# data[].attributes.subject
450 BCE                             Philosopher Anaxagoras suggests that the stars are suns

# data[].attributes.body
Fact One: Anaxagoras thought that stars were similar to our sun.

Fact Two: The religious group didn't like his ideas and he was exiled from Athens.

# data[].attributes.headline
1543 A.D.                                   Copernicus published “De Revolutionibus Orbium Coelestium”     

# data[].attributes.subject
1543 A.D.                                   Copernicus published “De Revolutionibus Orbium Coelestium”     

# data[].attributes.body
Fact One: In the Renaissance period modern astronomy started to form.

Fact Two: In this book, Copernicus used evidence to prove Aristrachus’ heliocentric view of the Universe. This was a brave thing to do because people took the subject of the universe very seriously.

# data[].attributes.headline
1605 A.D.                               Johannes Kepler discovers that the planets have an elliptical orbit around the Sun. 

# data[].attributes.subject
1605 A.D.                               Johannes Kepler discovers that the planets have an elliptical orbit around the Sun. 

# data[].attributes.body
Fact one: Until Kepler discovered this people believed that the planets traveled in perfect circles.

Fact Two: After he discovered this he went on to propose his three laws of planetary motion.

# data[].attributes.headline
1957 A.D Oct. 4th                       The Sputnik 1 satellite becomes the first man-made object to orbit the Earth. 

# data[].attributes.subject
1957 A.D Oct. 4th                       The Sputnik 1 satellite becomes the first man-made object to orbit the Earth. 

# data[].attributes.body
Fact one: The Russians successfully sending Sputnik 1 into orbit marked the start of the Space race.

Fact Two: This was a huge accomplishment for mankind, and it opened the door to so many possibilities and opportunities.

# data[].attributes.headline
1957 A.D. Nov. 3rd                          Sputnik 2 successfully takes an animal into space. 

# data[].attributes.subject
1957 A.D. Nov. 3rd                          Sputnik 2 successfully takes an animal into space. 

# data[].attributes.body
Fact one: This was a major accomplishment for the USSR as it proved that living things can survive in space.

Fact Two: Sputnik 2 was horrible news for the Americans because it meant that they were falling behind and the Russians were beating them.

# data[].attributes.headline
1969 A.D.                                  Neil Armstrong and Buzz Aldrin walk on the Moon.

# data[].attributes.subject
1969 A.D.                                  Neil Armstrong and Buzz Aldrin walk on the Moon.

# data[].attributes.body
Fact One: The Apollo 11 mission changed the course of the space race and achieved the "impossible".

Fact Two: This mission gave everyone hope and Space travel continued to grow and improve after this mission.

# data[].attributes.headline
2019 A.D. Jan. 3rd                     First landing on the moons far side. 

# data[].attributes.subject
2019 A.D. Jan. 3rd                     First landing on the moons far side. 

# data[].attributes.body
Fact One: People have already walked on the moon, but China was the first to land on the far side.

Fact Two: The Chang’e-4 probe is part of China's bigger mission to build a base on the moon and conduct research.

# data[].attributes.body
Logsdon, J. M. (2024, August 30). Space exploration | History, Definition, & Facts. Encyclopedia Britannica. https://www.britannica.com/science/space-exploration/History-of-space-exploration

Miller, J. (2024, March 22). Important Dates In The Timeline Of Astronomy. https://www.astronomytrek.com/important-dates-in-the-timeline-of-astronomy/

Astronomy Timeline. (n.d.). https://teideastro.com/assets/files/Astro/Astronomy%20timeline.pdf

Astronomers of the 20th and 21st Century timeline. (1912, May 5). Timetoast Timelines. https://www.timetoast.com/timelines/astronomers-of-the-20th-and-21st-century

OpenStax_Chapter_2_sections 2,2 thru 2.4.pdf. (n.d.). Google Docs. https://drive.google.com/file/d/1XGjhEuahoVHWI5wjnvyPSjylHF51YokI/view