The sun's distance from Earth changes throughout the year but it has nothing to do with the seasons. The term "perihelion" describes the point in an astronomical body's orbit where it is nearest to ...

Mars has captivated humans since we first set eyes on it as a star-like object in the night sky. Early on, its reddish hue set the planet apart from its shimmering siblings, each compelling in its own ...

NASA’s decades-long watch on near-Earth space has revealed a landscape that is far more dynamic, and far more intricate, than early asteroid hunters imagined. Instead of a simple backdrop of rocks ...

The current price of ORBIT (GRIFT) is $0.0007188, as of Dec 13, 2025. Over the last 24 hours, the price has moved by -7.32%, with a change of 0.5% in the past hour. For longer-term performance, the ...

I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, these ...