One among those concepts is, “Why does the sky appear blue during ... is nothing but the dark expanse of space, which is why space appears black to us. At sunrise and sunset, the light has ...

View a brilliant morning star, enjoy dark skies during New Moon, and take in plenty of deep-sky targets in the sky this week.

Before going dark ... the Sun sank in the sky. According to Firefly, NASA will analyze these images for hidden insights into the Moon's day-night cycle. Blue Ghost's sunset images are a tad ...