A rare Einstein ring spotted near our galaxy offers a unique chance to test Einstein’s general relativity and study the ...

Recent technological advances have opened new possibilities for the development of robotic systems, including spacecraft for the exploration of other planets. These new systems could ultimately ...

While the Martian clouds may look like the kind seen in Earth’s skies, they include frozen carbon dioxide, or dry ice.

The United States needs to restore its focus on space as a national security priority as conditions have changed and threats ...