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This is a timeline of astronomy. It covers ancient, medieval, Renaissance-era, and finally modern astronomy. ... and planets move around Earth in perfect circles. 380 ...
The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun. The reform advanced the date by 10 days: Thursday 4 October 1582 was followed by Friday 15 ...
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 ...
c. 16th century BCE – Mesopotamian cosmology has a flat, circular Earth enclosed in a cosmic ocean. [1]c. 15th–11th century BCE – The Rigveda of Hinduism has some cosmological hymns, particularly in the late book 10, notably the Nasadiya Sukta which describes the origin of the universe, originating from the monistic Hiranyagarbha or "Golden Egg".
This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. It includes: It includes: All spacecraft that have left Earth orbit for the purposes of Solar System exploration (or were launched with that intention but failed), including lunar probes .
The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
First full-disk pictures of the Earth, published in Review of Popular Astronomy July–August. [31] [20] August 23, 1966 Lunar Orbiter 1: First image of Earth from another astronomical object (the Moon) and first picture of both Earth and the Moon from space. [32] [33] [34] [7] [19] December 11, 1966 ATS-1
This list may not reflect recent changes. A. Timeline of astronomical maps, catalogs, and surveys; ... Timeline of solar astronomy; Timeline of Solar System astronomy;