On Feb. 24, from west to east, you can see Mercury, Saturn, Neptune, Venus, Uranus, Jupiter and Mars, all spanning 117.5°, plus Earth under your feet—all eight known planets of our solar system!
NASA is gearing up for the launch of SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer), a powerful new space telescope set to lift off in late ...