A Flower-Shaped Rock on Mars

Image Credit: NASA, JPL-Caltech, MSSS It is one of the more unusual rocks yet found on Mars. Smaller than a penny, the rock has several appendages that make…

NASA. Symbiotic R Aquarii

Image Credit: X-ray: NASA/CXC/SAO/R. Montez et al.; Optical: Data: NASA/ESA/STScI, Processing: Judy Schmidt (CC BY-NC-SA)Explanation: Variable star R Aquarii is actually an interacting binary star…