... Wisps like this are all that remain visible of a Milky Way star. ... Dark Sand Cascades on Mars . ... Groups of dark brown streaks have been photographed by the Mars Reconnaissance Orbiter on melting pinkish sand dunes covered with light frost. The above image was taken in 2008 April near the North Pole of Mars. NGC 1365: Majestic Spiral with Supernova . ... Barred spiral galaxy NGC 1365 is truly a majestic island universe some 200,000 light-years across. ... How massive can a normal star be? ...