太陽系形成の常識を覆すかも? 彗星表面に大量の酸素分子を発見。ESA 探査機ロゼッタの観測データから - Engadget JapaneseParrots in captivity seem to enjoy video-chatting with their friends on Messenger
フォトレポート：ホームズ彗星が大バースト、約40万倍の明るさに
10月23日の時点で、ホームズ彗星は望遠鏡でかろうじて確認できる程度の明るさしかなかった。ところがその後、この彗星はごく短い間に急に増光（アウトバースト）し、もとの約40万倍という明るさになった。現在は肉眼でも容易に確認できる。同彗星は今なお拡大を続け、この大増光で色まで変化している。科学者たちは、この彗星の突然の変化に驚き、その原因について頭を悩ませている。正式には「17P/Holmes」として知られるホームズ彗星は、1892年に発見された（発見当時の写真は最後のページで紹介する）。科学者たちは、あと数週間のうちには大量放出されたガスが散逸し、現在の光度も失われていくと予測している。インドのビジネス誌The Economic Timesの報道によると、インドのコルカタ（カルカッタ）でUFOの観測報告があったが、それもこのホームズ彗星の大アウトバーストが原因だった可能性があるという。このホ
APOD: 2007 February 5 - Comet Between Fireworks and Lightning
Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 February 5 Explanation: Sometimes the sky itself is the best show in town. On January 26, people from Perth, Australia gathered on a local beach to watch a sky light up with delights near and fa
Spaceweather.com: Comet McNaught (C/2006 P1)
Summary: Comet McNaught swung by the Sun in mid-January 2007. Fierce solar heat turned it into the brightest comet in 40 years; for a few days it was actually visible in broad daylight! When McNaught emerged from the sun's glare into the skies of the Southern Hemisphere, the tail alone stopped traffic and was mistaken for a brush fire, an explosion, a mysterious cloud and probably many other thing
APOD: 2007 January 22 - The Magnificent Tail of Comet McNaught
Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 January 22 Explanation: Comet McNaught, the Great Comet of 2007, has grown a long and filamentary tail. The spectacular tail spreads across the sky and is visible to Southern Hemisphere observer
APOD: 2007 January 20 - SOHO: Comet McNaught Movie
Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 January 20 Explanation: This frame from a spectacular time lapse movie shows Comet McNaught - the Great Comet of 2007 - sweeping through the inner solar system. The movie frames were recorded fr
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APOD: 2007 March 31 - Hale-Bopp: The Great Comet of 1997
APOD: 2007 March 30 - Three Galaxies and a Comet
APOD: 2007 February 12 - Comet McNaught Over New Zealand
APOD: 2007 February 1 - A Tail of Two Hemispheres
APOD: 2007 January 24 - A Comet Tail Horizon
日本惑星協会
APOD: 2007 January 19 - McNaught's Matinee
APOD: 2007 January 18 - Southern Comet
APOD: 2007 January 17 - Comet McNaught from New STEREO Satellite
APOD: 2007 January 15 - Comet McNaught Over Catalonia
APOD: 2007 January 13 - Comet Over Krakow
APOD: 2007 January 9 - McNaught Now Brightest Comet in Decades
日本惑星協会
謎の彗星地球に接近 | スラド