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Planets of the Solar System
A
planet is a large, rounded astronomical body that is neither a
star nor a
stellar remnant . The
Solar System has eight (pictured) : four
terrestrial planets ,
Mercury ,
Venus ,
Earth and
Mars ; and four
giant planets ,
Jupiter ,
Saturn ,
Uranus and
Neptune . The term "planet" at first included the
Sun ,
Moon and the five naked-eye planets that move across the background of the stars; they were seen as having associations with the gods.
Copernicus theorized the Earth was a planet and, like the others, orbited the Sun. "Planet" came to include many objects, such as moons, within and beyond the Solar System. The
International Astronomical Union in 2006 defined a planet in the Solar System to have
cleared its neighborhood of other
bodies , and that extrasolar planets should orbit stars and not be large enough to support
deuterium fusion . Many planetary scientists, though, still apply the word "planet" more broadly, including
dwarf planets ,
planetary-mass moons ,
rogue planets and
brown dwarfs . (
Full article... )
Mencap video featuring George Webster
Saulos Chilima
June 18 :
Autistic Pride Day
Cadaver Tomb of René of Chalon
1898 – The
Cadaver Tomb of René of Chalon (pictured) in
Bar-le-Duc , France, was designated a
monument historique .
1958 – English composer
Benjamin Britten 's one-act opera
Noye's Fludde was premiered at the
Aldeburgh Festival .
1981 – The
Lockheed F-117 Nighthawk , the first operational aircraft to be designed around
stealth technology , made its maiden flight.
1994 –
The Troubles :
Ulster Volunteer Force members
attacked a crowded bar in
Loughinisland , Northern Ireland, with
assault rifles , killing six people.
2009 – The
Lunar Reconnaissance Orbiter ,
NASA 's first mission to the Moon in more than ten years, was launched from
Cape Canaveral , Florida.
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