NEW YORK (AP) — Venus will pass between the Earth and sun on Saturday during what’s called an inferior conjunction. But don’t plan on seeing the linkup. The sight is extremely difficult to ...

Cataclysmic variables (CVs) are binary star systems composed ... by Jiamao Lin of the Sun Yat-sen University in Zhuhai, China, reports the discovery of a new CV of the polar subclass.

 The stratospheric polar vortex emerges during the winter season in the hemisphere where Earth's pole faces away from the ...