［A Star of the Eighth Magnitude 八等星の星］ Stephen Smith April 18, 2017Picture of the Day The planet Neptune in visible light (left) showing Proteus (top), Larissa (lower right), Despina and Galatea (left). Top right, enhanced color, bo…

［A Bridge of Sighs ため息の橋］ Stephen Smith April 19, 2017Picture of the Day False-color image shows a putative dark matter “bridge” between galaxies. 偽色の画像は、銀河間の推定的な暗黒物質の「架け橋」を示しています。 ――――――――― Apr 19, …