Now, this is a beautifully made diagram. It illustrates, according to NASA’s website, ‘the differences between orbits of a typical near-Earth asteroid (blue) and a potentially hazardous asteroid, or PHA (orange).’ ‘Our yellow sun sits at the center of the crowd, while the orbits of the planets Mercury, Venus and Mars are shown in grey. …Continue Reading
This picture was taken by NASA’s Messenger spacecraft, which is in orbit around Mercury. According to NASA’s website, ‘the shadowing helps define the striking “Mickey Mouse” resemblance, created by the accumulation of craters over Mercury’s long geologic history.’ Photo: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
