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Posts by
EarthSky Voices
Asgardia’s 1st satellite due to launch
Asgardia's 1st satellite - Asgardia-1 - will launch aboard a NASA mission to ISS later this summer. "Asgardians" are invited to send their personal data - a photo or a file of their choosing – to space with it.
June 28, 2017
How much traffic on eclipse day?
Expert analysis showing how many people - and how much traffic congestion - can be expected along the path of the August 21, 2017 total solar eclipse.
June 26, 2017
What’s a conjunction?
When two heavenly bodies seem to come together: EarthSky community member Tom Wildoner explains the term "conjunction" in astronomy.
June 23, 2017
Climate change shrinking Colorado River
Ongoing drought - and increasing temperatures - have reduced water flow in the Colorado River, with more dramatic reductions expected. This ongoing, unprecedented event threatens water supplies in cities in the U.S. West and some of the most productive agricultural lands anywhere in the world.
June 15, 2017
A novel approach to star trails
Featured in National Geographic and Nature, Canadian amateur astronomer Christian Sasse explains how he created his unique star trails, by superimposing images.
June 5, 2017
LIGO’s 3rd gravitational wave detection
Albert Einstein hypothesized these ripples in the fabric of space-time a century ago. Now scientists have detected them for the 3rd time, from distant black hole collisions.
June 2, 2017
Top 5 questions about tornadoes
More tornadoes occur in the U.S. than any other country, mainly in the Great Plains, Midwest and southern states. Two meteorology professors answer questions.
May 31, 2017
Mystery light shines near Cygnus A core
When astronomers aimed the Very Large Array at the well-studied galaxy Cygnus A, they were surprised to find a bright new object near the galaxy’s core. Supernova explosion, or a second supermassive black hole?
May 24, 2017
Denmark’s never-ending May twilights
Happening now in Denmark: "bright nights," when the sun is never far below the horizon. Photographer and videographer Adrien Mauduit tells the story and provides stunning imagery.
May 23, 2017
Astronomers find waves in Io’s lava lake
New data on the massive molten lake on Jupiter's moon Io - most volcanically active world in our solar system - suggest 2 lava waves per day, slowly sweeping west to east.
May 10, 2017
