A new study explores the potential of nuclear fission-powered propulsion for advanced deep space exploration. Specifically, ...

On the evening of May 27, the 23-hour-old moon will appear low in the northwestern sky starting about a half-hour after ...

Jupiter’s moon Ganymede may have shifted on ... with bright regions of ridges alongside grooves that cut across darker areas. Hirata took a closer look at the system of furrows on Ganymede ...

This is caused by sunlight reflecting off the Earth out to the moon and back to our ... crater walls reach to the edge of moon's disk and "cut it up" into small slices. In the past two weeks ...