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Near-Earth asteroid (99942) Apophis will pass Earth at a relatively small distance of 31,200 km (19,400 mi) above Earth's surface, closer than some geosynchronous satellites. [5] 2029 June 26 Total lunar eclipse. With an umbral eclipse magnitude of 1.84362, it will be the largest total lunar eclipse of the 21st century. 2029 December 20
From planetary meet-ups to the first total lunar eclipse in three years, here are the top astronomy events to look for throughout 2025: Stellar views of Mars will greet stargazers in January as ...
In 2008, the organizers coordinated the week with Earth Hour. [2] 7 2009 April 20–26 25 April International Year of Astronomy (IYA 2009) In 2009, the United States Dark Sky Week becomes International Dark Sky Week [13] [14] 8 2010 13–14 April [15] [16] 9 2011 3 April The world's first International Dark Sky City was founded in Flagstaff, AZ ...
The sun, moon and Earth will align to create an annular solar eclipse on Oct. 14, an event that is sometimes referred to as a Ring of Fire eclipse since the moon does not completely block out the ...
Pluto occulted stars in 1988, 2002, and 2006, allowing its tenuous atmosphere to be studied via atmospheric limb sounding. In rare cases, one planet can pass in front of another. [5] If the nearer planet appears larger than the more distant one, the event is called a mutual planetary occultation.
Millions of people will travel from around the world to see the top astronomy event of 2024, and for North America, it will arguably be the best astronomy event of the decade.
Historically, optical astronomy, which has been also called visible light astronomy, is the oldest form of astronomy. [59] Images of observations were originally drawn by hand. In the late 19th century and most of the 20th century, images were made using photographic equipment.
The tilt of the Earth's polar axis remains constant but describes a circular path in space during a period known as The Great Year. The term Great Year has more than one major meaning. It is defined by scientific astronomy as "The period of one complete cycle of the equinoxes around the ecliptic, or about 25,800 years".