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A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, the final minute, and the final second. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.787 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
The Astronomical Almanac [1] is an almanac published by the United Kingdom Hydrographic Office; it also includes data supplied by many scientists from around the world.On page vii, the listed major contributors to its various Sections are: H.M Nautical Almanac Office, United Kingdom Hydrographic Office; the Nautical Almanac Office, United States Naval Observatory; the Jet Propulsion Laboratory ...
The Astronomical Almanac for 1984 through 2002 were based on JPL ephemeris DE200, and from 2003 to 2014 the Astronomical Almanac was based on JPL ephemeris DE405. [9] As of 2022, the Almanac is derived from DE430. [15] The JPL ephemerides are widely used for planetary science; some examples are included in the Notes and References.
The Julian calendar began officially on Jan. 1 in 45 BCE and continued to be used until the 16th century when the slightly overestimated solar calendar had caused major dates like Easter to change.
[1] [2] [a] It was a central concept in a number of ancient sciences, providing the framework for key measurements in astronomy, astrology and calendar-making. From the perspective of an observer on Earth, the Sun's movement around the celestial sphere over the course of a year traces out a path along the ecliptic against the background of ...
The astronomical clock in the tower of the New Town Hall was installed in 1910. Kryštofovo Údolí. The Kryštofovo Údolí astronomical clock is a modern astronomical clock (inaugurated in 2008), built-in a former electrical substation. Hojsova Stráž. An astronomical clock in the Bohemian Forest was inaugurated in 2017. It has a concentric ...
Ahargana - The Astronomy of the Hindu Calendar Explains the various calendric elements of the Hindu calendar by means of astronomical simulations created using Stellarium. drikPanchang, an online Hindu almanac (IAST: pañcāṅga). Stellarium, the astronomy software that was used to create the animations featured in this article.
The Toledan Tables, or Tables of Toledo, were astronomical tables which were used to predict the movements of the Sun, Moon and planets relative to the fixed stars. They were a collection of mathematic tables that describe different aspects of the cosmos including prediction of calendar dates, times of cosmic events, and cosmic motion. [2]