EarthSky News - Dec 31 - Top 6 EarthSky Posts in 2016

December 31 Top 6 EarthSky Posts in 2016 by:

Solid evidence for a 9th planet If it exists, the 9th planet has 10 times the mass of Earth - orbits 20 times farther from the sun than Neptune - and takes 20,000 years to orbit the sun once. Tabby's Star: More weirdness Some astronomers think this star may have an alien megastructure - an energy-gathering Dyson sphere - around it. Here's a glimpse of the controversy. How long to travel to Alpha Centauri? Star travel via conventional propulsion and warp drives, plus a $100 million investment in proof-of-concept studies for an all-new way to get to the stars. Top 10 cool things about stars Unexpected, intriguing facts about the stars of our universe – including our sun – that you probably didn't know. How far is a light year? This post brings the scale of light-years down to the scale of miles and kilometers. Top gallery of 2016: Eclipse over Indonesia These were the most-viewed images at EarthSky in 2016. Tonight ... A leap second  Delay those New Year's plans. World timekeepers will add a leap second just before midnight. Tonight ... Can you see a comet? Comet 45P/Honda-Mrkos-Pajdušáková is there, but too faint to see with the eye alone. Tonight … Sirius' midnight culmination On New Year's Eve, look up for the brightest star Sirius in the constellation Canis Major. It's at its highest in the sky at midnight.

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Sirius' midnight culmination The sky's brightest star is highest in the sky at midnight.

Top gallery of 2016: Eclipse over Indonesia Looking forward to 2017's total solar eclipse over North America? Then you'll enjoy these photos of the total solar eclipse over Indonesia in March 2016. They were the most-viewed images at EarthSky over this past year. This image is by Justin Ng. Submit your photo to EarthSky here!

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