The diameter of the moon is 3.48 × 106 m, and the radius of lunar orbit is 3.8 × 108 m. Explain briefly, with the help of a labelled diagram, the basic principle of the working of an a.c.generator.

When students engage multiple senses to learn—drawing or acting out a concept, for example—they’re more likely to remember ...

New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

U.S. Research Ecosystem is One of Our Greatest Strengths By Bill Gropp, NCSA Director ...

INDIANA, USA — Look up mid-March, and you'll see the moon turn blood red. The next total lunar eclipse will occur on the night of March 13-14 (Thursday-Friday) across the western hemisphere as ...

Reporting on missions to the moon and beyond. NASA is aiming to send astronauts back to the moon, because that is what President Trump set as the destination of the agency’s human spaceflight ...

INDIANA, USA — Look up mid-March, and you'll see the moon turn blood red. The next total lunar eclipse will occur on the night of March 13-14 (Thursday-Friday) across the western hemisphere as ...

We tend to think of the moon as a cold, dusty rock, but in fact, its surface can get pretty hot during a lunar day. How hot? It turns out that the answer can vary dramatically over a very short ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Blue Ghost ...

Researchers have traced a mysterious radio signal back to an 'unprecedented' region of space for the very first time.