Earth’s tilt is what causes the seasons; in the summer, when our planet’s pole is tipped toward the sun, the days are longer, ...

This month will usher in two separate conjunctions — one between the moon and a rarely-visible Mercury, and another between ...

Pictures from a simulated moon landing, not designed to fool anyone into believing a fake but rather to provide a reference to make sure that we can get the best video images possible when astronauts ...

The images show ultra-fine bright and dark stripes (called striations) in the thin, gaseous layer of the sun's atmosphere ...

June sky shows planets before sunrise, Mars near Regulus, the glowing Milky Way, and the solstice with shifting daylight hours.

One cannot get any closer to the real thing.” Melanie Cowan, ESA’s liaison officer in the CCSDS Motion Imagery and ...