Seeing a jet’s shock wave

If you could see the shock wave from a jet moving faster than sound, this is what it would look like.

Wonderful solar halo over Croatia

High above Earth, tiny ice crystals create halos by refracting and reflecting the light of the sun or moon.

Best photos: Amazing moon and planets October 7-11

Best photos of the moon's glorious sweep past the planets Venus, Jupiter, Mars and Mercury. Photos from EarthSky friends. October 7, 8, 9, 10 and 11.

Traveling at warp speed through aurora territory

Fun photo from a great nature photographer, Göran Strand in Sweden.

Planets, east before dawn, October 2, 2015

Don't miss these bright planets in the east before dawn. They'll perform an intricate dance throughout October, 2015.

Stars over Mount Rainier

A beautiful place to see the night sky and contemplate nature's power.

Planets, east before dawn

Brightest planets Venus and Jupiter are up before dawn now. Mars is there, too. Mercury will soon join. During October ... wow! They're going to put on a show.

Hurricane Joaquin, 5 a.m., October 1, 2015

Hurricane Joaquin will batter the central Bahamas with hurricane force winds, storm surge and heavy rain through tonight.

Fires in Indonesia spread smoke

Indonesia's annual land-clearing fires sent smoke into other parts of Southeast Asia last week. In Singapore, schools closed Friday as air pollution hit a high.

Best photos of the total lunar eclipse

Best photos of the September 27-28, 2015 total eclipse of the moon from awesome EarthSky community members! Thanks to all who posted.