Winter sun halo

Fiona M. Donnelly captured this beautiful sun halo on February 1, 2017 in Smiths Falls, Ontario.

Undersea eruption

View from space of underwater eruption near Tongatapu.

See it! Young moon, Venus, Mars

The moon has returned to the evening sky. This week, it's sweeping past brilliant Venus and fainter Mars. Photos from the EarthSky community, here.

Space station moon

The International Space Station flying in front of the moon on January 14 as seen from the European Space Agency's space science center near Madrid, Spain.

Orion, from China’s Great Wall

The link between the constellation we know as Orion the Hunter and the Chinese New Year, celebrated throughout Southeast Asia and the world, and coming in 2017 on January 28.

Contrail shadow

Jet contrail shadows appear to be cast by a low-altitude bright light shining upwards. In fact, the light source is the sun, and the shadow is cast downward on clouds below.

Hole-punch clouds over SoCal

Hole-punch clouds result from a combination of cold temperatures, air traffic, and atmospheric instability. Conditions were ripe for making them over southern California last weekend.

Favorite photos from this weekend

The EarthSky community on Facebook outdid itself posting photos over the weekend of January 20-22, 2017. Thanks, everybody! Editors' picks here.

Waning moon in sunrise colors

Jüri Voit captured this photo Saturday morning - January 21, 2017 - in Kuusalu, Estonia.

X marks the spot

A beautiful morning in Northern Norway.