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Was another civilization on Earth before humans?
How do we know earlier industrial civilizations on Earth didn't rise and fall long before humans appeared? That's the question posed in a new scientific thought experiment.
April 18, 2018
Green moon on April 20, 2018? Nah
For weeks, people have searched for this post more than any other at EarthSky. No, there won't be a green moon on April 20, 2018. It's a joke, y'all, with its roots (ahem) in cannabis culture. :-)
April 18, 2018
Underwater noise pollution stresses aquatic animals
The roar of motors, ping of military sonar, bangs and blasts from offshore development are distracting, confusing, and even killing, aquatic animals.
April 17, 2018
Impossibly starry skies over NYC
This week is International Dark Sky Week. Celebrate by watching this impossible, but magical, video of dark, starry skies over light-polluted New York City. It's new from Project Skyglow.
April 15, 2018
Watch launch of TESS planet-hunting mission April 16
TESS will launch on a SpaceX Falcon 9 rocket from Cape Canaveral Air Force Station in Florida. Lift-off is planned for no earlier than 6:32 p.m. EDT (10:32 p.m. UTC).
April 15, 2018
IAU approves names for Pluto’s moon Charon
NASA held a public naming contest in 2015, just before New Horizons' sweep past Pluto and Charon. The spacecraft mission team has used many of the Charon feature names since. Now the IAU gives the names the nod.
April 12, 2018
Cosmic gorilla effect could blind detection of aliens
Could it be that the more rational and methodical searches for extraterrestrial intelligence are overlooking "the gorilla in the room?" A new study suggests it's possible.
April 11, 2018
Whoa! New and giant telescopes ahead
Telescope technology has come a long way. Here are 4 new amazing machines for observing the universe, both from space and from Earth.
April 11, 2018
Goodbye Kepler, hello TESS: Passing the baton in exoplanet search
When NASA first started planning the Kepler mission, no one knew if the universe held any planets outside our solar system. Thousands of exoplanets later, the search enters a new phase.
April 11, 2018
Look up: It’s a satellite!
"I use the Heavens Above astronomy site or the Starry Night app to check on satellites ... they are fun to spot."
April 8, 2018
