NASA officials remain eager for Starliner to begin these regular crew rotation flights, even as its sole destination, the ISS ...

"Dust devils themselves are difficult to capture in images because they are so short-lived," Ingrid Daubar, a planetary ...

"Our work is a new piece of evidence that suggests that Mars was once a much more complex and active planet than it is now." ...

On average, from the point of view of the sun, the Earth completes one full rotation around its axis every 24 hours or 86,400 seconds, give or take a few milliseconds. A millisecond (ms) is 0.001 of a ...