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Astronomy was used by early cultures for a variety of reasons. These include timekeeping, navigation, spiritual and religious practices, and agricultural planning. Ancient astronomers used their observations to chart the skies in an effort to learn about the workings of the universe.
Mayan astronomers discover an 18.7-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.
1632 – Galileo Galilei is sometimes credited with the discovery of the lunar libration in latitude, [87] although Thomas Harriot or William Gilbert might have done so before. [88] 1639 – Jeremiah Horrocks and his friend and correspondent William Crabtree are the first astronomers known to observe and record a transit of Venus. [89]
2005 — Spitzer Space Telescope data confirm what had been considered likely since the early 1990s from radio telescope data, i.e., that the Milky Way Galaxy is a barred spiral galaxy. [14] [15] [16] 2012 — Astronomers report the discovery of the most distant dwarf galaxy yet found, approximately 10 billion light-years away. [17]
Radar astronomy is the technique for observing nearby astronomical objects by reflecting radio waves or microwaves off target objects and analyzing their reflections, which provide information about the shapes and surface properties of solid bodies, unavailable by other means. Radar can also accurately measure the position and track the ...
This discovery showcases the incredible power of JWST. Scientists first captured ultra-deep imaging data and followed that analysis with a spectroscopy with NIRSpec.Using this instrument’s Multi ...
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
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