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Mars life clues from methane and ‘sticks’
The Curiosity rover has made 2 new and interesting discoveries - the first about methane in Mars' air and the other about stick-rock formations - both related the possibility of life.
January 12, 2018
Sun in zodiac constellations, 2018
Sun entry dates into zodiac constellations, using boundaries for constellations set by the International Astronomical Union in the 1930s.
January 12, 2018
Fast radio bursts: A mystery unfolds
Repeating, short, unpredictable radio bursts left astronomers perplexed. Now they think the bursts were twisted by the extreme environment around a supernova or supermassive black hole.
January 10, 2018
New year’s comets
Will 2018 give us a bright comet? There are a couple of possibilities. In the meantime, here are some photos of comets, visible through telescopes, as 2018 begins.
January 9, 2018
10 places to find snow beyond Earth
On Earth, you can find snow from the poles to mountaintops in the tropics. There are plenty of other places in the universe that are home to snow as well.
January 4, 2018
No alien megastructure for Tabby’s Star
This star’s odd, sporadic dimmings and brightenings caused speculation about vast structures built by alien civilizations. But a crowd-funded observing campaign led to a different conclusion.
January 3, 2018
Did our solar system form in a bubble around a giant star?
And now ... a big bubble theory. Scientists are discussing the possibility that our solar system formed in wind-blown bubbles around a giant, long-dead star.
January 3, 2018
Next New Horizons flyby will happen a year from today
The New Horizons flyby of Kuiper Belt object 2014 MU69 - a year from today, on January 1, 2019 - will be the most distant in the history of space exploration.
January 1, 2018
Top 7 EarthSky stories of 2017
Here are 7 of the most-viewed news and feature stories of this past year.
December 29, 2017
Scientists expect 1st direct black hole image soon
This was the most popular post at EarthSky this week, and no wonder. It's exciting! Scientists expect the 1st-ever direct image of a black hole's event horizon, soon.
December 28, 2017
