As the sun sets, it looks redder and redder as it gets closer to the horizon. Why does this happen?
Posts by EarthSky
Powerful telescopes coming soon. Where shall we point them to find extraterrestrial life? Astronomers have created a way to help prioritize exoplanets.
Today’s sky chart shows the constellations of the Zodiac that are up after nightfall on these October evenings.
Beautiful and fascinating images from the New Horizons spacecraft reveal the large moon’s violent history.
In the fall, the leaves of some trees turn yellow, orange or red. The bright colors are wonderful to behold. But do they have some hidden purpose?
October has two birthstones – opal and tourmaline.
Hadrosaur was a truly polar dinosaur that endured months of winter darkness and probably experienced snow.
There are typically 12 full moons and 12 new moons every year, but only four to seven eclipses.
Happy autumn (or spring, if you’re in the Southern Hemisphere)! Enjoy the photos.
The 2015 Arctic sea ice minimum summertime extent is the 4th lowest since observations from space began, according to a NASA analysis of satellite data.