This Day In Astro History

visualization of 2001AA
Io with Jupiter in the background
Images of Io captured on the dawn of the new millennium, January 1, 2001 10:00 UTC (spacecraft time), two days after Cassini's closest approach to Jupiter.(source)

Click for large picture

January 1

Happy Next Orbit!

2014 - The first discovered asteroid of 2014, designated 2014 AA, impacted the Earth over the mid-Atlantic Ocean.

2001 - (Near Earth Asteroid Tracking mission) discovers a 1.5 km sized Mars crossing object 2001AA and dubs it the Millennium Asteroid.

ngc253_eso2 1925 - No longer an Island Universe! At a joint meeting of the American Astronomical Society; and the American Association for the Advancement of Science in Washington, D.C. Edwin Hubble's paper announcing he had found Cephids in "spiral nebulas" initiated the decline in the belief that our Milky Way galaxy was the entire universe. Hubble's discovery would lead to the knowledge that we live in one of many galaxies.

1801 - Guiseppe Piazzi discovered the object between Mars and Jupiter that he called Ceres Ferdinande a (the roman goddess of agriculture). Piazzi's discovery eventually became known under either the name Ceres or the symbol(1), where the numeral, originally placed inside a complete circle indicated that this was the first object found in that region of the solar system. By 1923, when (1000) was announced, the set of objects, while still mainly members of that Cisjovian Belt (also known simply as the "Asteroid Belt", or "Main Belt" of "minor planets"), also included objects that approached within 0.1 AU of the earth or extended out to the orbit of Saturn. Ceres is the largest of the belt objects. At an estimated 918 miles in diameter it accounts for one third the mass of all belt asteroids combined. Its is 2.767 AU (AU=Earth-Sun distance) and it orbits the Sun every 4.61 years.
as seen from Hubble Telescope

Guiseppe Piazzi
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It is my conclusion that human evolution and the motions of matter in space are intrinsically linked. The observation and understanding of the complexity of biological history on Earth cannot be complete without the tandem observation and understanding of a dynamic greater cosmos. - SpaceGene