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The IYA2009 logo International Year of Astronomy commemorative coin. The International Year of Astronomy (IYA2009) was a year-long celebration of astronomy that took place in 2009 to coincide with the 400th anniversary of the first recorded astronomical observations with a telescope by Galileo Galilei and the publication of Johannes Kepler's Astronomia nova in the 17th century. [1]
Some calendars listed are identical to the Gregorian calendar except for substituting regional month names or using a different calendar epoch. For example, the Thai solar calendar (introduced 1888) is the Gregorian calendar using a different epoch (543 BC) and different names for the Gregorian months (Thai names based on the signs of the zodiac).
1 January: Beginning of International Year of Astronomy: 3 January: Quadrantids peak : 4 January, 14:00: Mercury at maximum eastern elongation: 4 January, 14:00: Earth at perihelion: 10 January, 11:00
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The Julian calendar inherited the definitions of the 12 month system, week, hour etc. from the Babylonian calendar and the current Jewish calendar can be seen as a slightly modified Babylonian calendar that still exists today and is practised, but with Anno Mundi Livryat haOlam year calculation since the creation of the world.
The year will also have its usual full moons and picturesque planetary conjunctions. Keep looking up, and use our 2024 astronomy calendar to plan for this year’s celestial wonders.
2009 was a common year starting on Thursday of the Gregorian calendar, the 2009th year of the Common Era (CE) and Anno Domini (AD) designations, the 9th year of the 3rd millennium and the 21st century, and the 10th and last year of the 2000s decade.
Spring can pose difficulties for stargazers across North America, as it is one of the cloudiest times of the year. However, when clouds break and clear conditions Mark your calendars: March is ...