Astronomers notice a new bright emission line in the spectrum of the Sun's atmosphere during an eclipse. The emission line is caused by an element's giving out light, and British astronomer Norman Lockyer concludes that it is an element unknown on Earth.
https://en.wikipedia.org/wiki/Timeline_of_astronomy
7. The Discovery. Galileo, arguably the most important scientist ever, used a fancy telescope he half invented and half stole the idea for to discover four moons orbiting Jupiter in 1610. They were the first moons of another planet to be spotted, making them a landmark discovery.
http://www.toptenz.net/top-10-most-important-discoveries-in-astronomy.php
Almost everything they knew about the universe camefrom what they could discover with their eyes and minds.Not surprisingly, most-early astronomers thought that the uni-verse consisted of the sun, the moon, and the. planets. Theythought that the stars were at the edge ofthe universe.
http://teacherweb.com/CT/Whisconier/Sciguy/Astronomy-the-original-science.pdf
The Moons of Jupiter. The Discovery. Galileo, arguably the most important scientist ever, used a fancy telescope he half invented and half stole the idea for to discover four moons orbiting Jupiter in 1610. They were the first moons of another planet to be spotted, making them a landmark discovery.
http://www.toptenz.net/top-10-most-important-discoveries-in-astronomy.php
One of the Oldest Observatories in South America is the Quito Astronomical Observatory [2] and is located in Quito, Ecuador. The Quito Astronomical Observatory is located in the Historic Center of Quito and 12 minutes south of the Equator in Quito, Ecuador.
https://en.wikipedia.org/wiki/Timeline_of_astronomy
The first major Arabic work of astronomy is the Zij al-Sindh by al-Khwarizimi. The work contains tables for the movements of the sun, the moon and the five planets known at the time. The work is significant as it introduced Ptolemaic concepts into Islamic sciences.
https://en.wikipedia.org/wiki/Timeline_of_astronomy
Of course you don’t, you’re not 80 years old. But in the world of astronomy radio is still important today, thanks to a discovery by Karl Jansky in 1931. His experiments with radio waves led him to find signals coming from the centre of the galaxy, and he’s considered the founding father of radio astronomy as a result.
http://www.toptenz.net/top-10-most-important-discoveries-in-astronomy.php
Modern Astronomy The invention of the telescope and the description of gravitywere two milestones in the development of modern astronomy.In the 200 years following Newton's discoveries, scientists mademany discoveries about our solar system. But they did not learnthat our galaxy has cosmic neighbors until the 1920s.
http://teacherweb.com/CT/Whisconier/Sciguy/Astronomy-the-original-science.pdf
The Hindu cosmological time cycles explained in the Surya Siddhanta, give the average length of the sidereal year (the length of the Earth's revolution around the Sun) as 365.2563627 days, which is only 1.4 seconds longer than the modern value of 365.2563627 days.
https://en.wikipedia.org/wiki/Timeline_of_astronomy
Babylonian astronomers discover an 18.6-year cycle in the rising and setting of the Moon. From this they created the first almanacs – tables of the movements of the Sun, Moon and planets for the use in astrology. In 6th century BC Greece, this knowledge is used to predict eclipses.
https://en.wikipedia.org/wiki/Timeline_of_astronomy
what were two milestones of modern astronomy?
The invention of the telescope and the description of gravity were the two milestones of modern astronomy. The invention of the telescope and the description of gravity were two milestones of modern astronomy.