高積雲 (Altocumulus Clouds)

　高積雲。まだら雲、ひつじ雲、むら雲ともいう。2010年10月14日午後4時4分、書斎の窓から撮影。

Altocumulus clouds (Alto, "high", cumulus, "heaped"). The photo was taken on October 14 at 16:04 from the window of my study.

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

About Astrophysics

"Moon really is 'silvery' Nasa discovers," Telegraph (October 21, 2010). —"Scientists have discovered that the surface of the Moon does actually contain deposits of the precious metal."

"How wet the moon? Just damp enough to be interesting," Science Vol. 330, p. 434 (October 22, 2010). —"The moon's recently discovered hydrosphere is nothing like Earth's watery regime."

About Books

"Royal Society's science book prize will be the last," BBC News (October 21, 2010). —"After more than two decades of sifting through the annual offerings of popular science publishing, the award is closing down due to lack of funding." [Retweeted by S. C. Kavassalis with her comment on the situation, "No!")

About Mathematics

An interesting proof that the volume of the bead with the height h is equal to the volume of the sphere with the diameter h! [Retweet of Arjen Dijksman's words] My blogpost: What's the volume of a bead? [Got a thanks message from Arjen for this retweet.]

About Physicists

"An interview with Anton Zeilinger," physicsworld, blog (October 15, 2010). —"A quantum pioneer who doesn't know his limits."

About Physics

"Neutrino spectroscopy can probe the dark matter content in the sun," I. Lopes and J. Silk, Science Vol. 330, p. 462 (October 22, 2010). [Retweeted by Colin Peters]

About Science

"In nature, number one dominates," physicsworld (October 20, 2010). —Numbers starting with the digit 1 occur most frequently in scientific data. [Retweeted by J. Tanaka with a comment, "数って本当にミステリアスです."]