［At Any Scale あらゆる規模で］ Stephen Smith October 19, 2017Picture of the Day Editor’s Note: Due to Northern California wildfires, the Picture of the Day will be on a temporary leave of absence. In the interim, please enjoy these articl…

［Ultraviolet Mars 紫外線火星］ Stephen Smith October 23, 2017Picture of the Day Blue indicates ultraviolet light from the sun. Green shows reflected sunlight. Red indicates ultraviolet sunlight reflected from the surface. 青色は太陽からの…

［Slip Sticks and Wrong Theories スリップスティックと間違った理論］ Mel Acheson October 25, 2017Picture of the Day Vector hyperbolic log-log slide rule. ベクトル双曲線対数計算尺。 Editor’s Note: Due to Northern California wildfires, the Pi…

［Sun Triggers 太陽のトリガー］ Stephen Smith October 25, 2017Picture of the Day Kreutz “sungrazer” comet. Image from SOHO on August 3, 2016. クロイツの「サングライザー」彗星。 2016年8月3日のSOHOからの画像。 ――――――――― 彗星は太陽の振る舞い…

［Over a Cloud Bridge クラウド・ブリッジの上］ Stephen Smith October 26, 2017Picture of the Day The Small and Large Magellanic Clouds over the Paranal Observatory in Chile. Editor’s Note: Due to Northern California wildfires, the Picture o…

［Cluster Crash クラスター・クラッシュ］ Stephen Smith November 7, 2017Picture of the Day Galaxy cluster, IDCS J1426.5+3508 (X-rays from Chandra in blue, visible light from Hubble in green, and infrared data from Spitzer in red). 銀河団、I…

［Take the Plunge 飛び込め］ Stephen Smith November 15, 2017Picture of the Day Credit: NASA/JPL-Caltech The tail of CGCG254-021. CGCG254-021の尻尾。 ――――――――― 電気的展望。 天文学者達は最近、銀河のCGCG254-021から外に向かって広がる銀河のフィ…

［Mapping the Absurd 不条理なマッピング］ Stephen Smith November 16, 2017Picture of the Day So-called “dark matter clumps” in a galaxy cluster. The “unseen matter” is a “smooth heap of dark matter”. 銀河団のいわゆる「暗黒物質の塊」。 「見…

［Jove’s Glowing Mantle ジョーブの輝くマントル］ Stephen Smith February 8, 2012Picture of the Day Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)Combined Hubble camera images of Jupiter's polar aurorae. 木星の極オーロラの結合…