秋色 ３ (Autumn Colors 3)

　3月に桜に似た花を咲かせるベニスモモは、秋には、深紅色の紅葉を見せる。2010年10月20日、堺市西区・鳳公園で撮影。

The purple cherry plum, which blooms blossoms like those of cherry in March, shows its leaves turned into crimson in autumn. The photo was taken at Ōtori Park, NIshi-ku, Sakai, on October 20, 2010.

From tweets of yesterday (edited by rephrasing, adding words, etc.)

About Astrophysics

"Bubbles of energy are found in galaxy," From end to end, the newly discovered gamma-ray bubbles extend 50,000 light-years, or about half of the Milky Way’s diameter. New York Times (November 9, 2010).

About Peace and Politics

［このところ］中国を仮想敵視した動きが急です。尖閣諸島をめぐる問題があるとはいえ、これが第九条を持つ国がやることでしょうか。九条のもとでは、仮想敵を持つ国であってはならないはずです。--「九条の会」メルマガ 106号、編集後記 (November 10, 2010).

About Physics

"The one-way speed of light conundrum." There's no dispute over the constancy of the speed of light when measured over a round trip. But what of its speed over a one-way trip? Technology Review (November 11, 2010).

"LHC runs on lead." Nature, The Great Beyond (November 09, 2010). —With heuristic pics showing difference in signals of proton–proton and lead ion–lead ion collisions.

[Retweet of Graham Farmelo's words] If you've ever wanted to know what a gauge theory really is, here's a very clear explanation from Terence Tau: "What is a gauge?" Blog "What' New" (September 27, 2008).