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

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

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

At the American Museum of Natural History here in New York, I had the pleasure of experiencing both at the same time.

This week, see how gold is leaking from the planet’s core, watch sharks sharing a communal meal, unearth Egyptian tombs, and ...