The International Space Station crosses the terminator, the line that separates night and day on Earth, as it orbits 254 miles above the Gulf of Guinea on Africa’s mid-western coast. Portions of the ...

In distant galaxies exist stars that are smaller and cooler than our own Sun. These so-called red dwarf or M dwarf stars also live 10 times as long as stars like ours and are the most numerous in our ...

The famed science fiction author Isaac Asimov called them "ribbon worlds" — planets forced to always show one face to their parent star. The star side is locked in perpetual day, its sun never dipping ...

The Moon rises around 3-4 p.m. this early this week and is high in the sky by sunset. It reached first quarter, sometimes called half-moon, phase on Saturday with the right half of the Moon, at least ...