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Best pics of the comet as it swept safely past
Comet 21P/Giacobini-Zinner came closer to Earth this week than it had in 72 years. Favorite photos here, from the EarthSky community. Plus info on comet Wirtanen, which might become visible to the eye alone later this year.
September 11, 2018
What is the Hypatia Catalog?
The Hypatia Catalog uses "big data" - extremely large data sets - hopefully to reveal patterns, trends, and associations that might lead to finding distant worlds harboring life.
September 11, 2018
What is a parsec?
Why do professional astronomers speak of distances in the universe not in terms of light-years, but in terms of parsecs, a distance of 3.26 light-years? Explanation here.
September 11, 2018
Rainbow over Penang Island, Malaysia
Joey Zahari Mawi caught this amazing cloud and rainbow last Saturday - September 8, 2018 - before the sunset.
September 11, 2018
Moon, Venus, Jupiter September 11 to 13
These next several days - September 11, 12 and 13, 2018 - look westward to spot the crescent moon, plus the planets Venus and Jupiter in the evening twilight.
September 11, 2018
Florence tracking toward U.S. coast: How to stay safe
Hurricane Florence is on track to hit the U.S. East Coast as a major storm later this week. Here are some tips if a hurricane is heading toward your area.
September 10, 2018
Summer 2018 was 4th hottest on record for U.S.
Summer 2018 - the months of June, July, and August - was the 4th hottest on record for the contiguous United States, according to a NOAA analysis
September 10, 2018
Top 3 myths about jellyfish
Myth #3: Applying urine to a jellyfish sting can reduce the pain
September 10, 2018
Beach mirrors sky over Lincolnshire, U.K.
When a thin film of water covered this beach, it looked as if people (and dogs) could walk in the sky.
September 10, 2018
Will you catch the young moon on September 10?
Africa and South America - and islands in the South Atlantic - have the best shot at tonight's young moon. Easier, generally, in the Southern Hemisphere than the Northern. If you miss it, look tomorrow!
September 10, 2018
