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No Earth-like atmosphere for Proxima b
It's the nearest exoplanet and in its star's habitable zone. But a new study suggests radiation from its star would drain an Earth-like atmosphere 10,000 times faster than on Earth.
August 1, 2017
Big Dipper to Polaris, Mizar, Alcor
Use the Big Dipper to find Polaris, the North Star. Then notice the two stars Mizar and Alcor in the Big Dipper’s handle.
August 1, 2017
Moon near star Antares on August 1
Antares is a red star in the south each summer. It was considered the Fire Star of the ancient Chinese.
August 1, 2017
Storm moving in
Niccole Kowalski said she witnessed this rainbow on Saturday, forming over the Superstition Mountains in Arizona, while a storm was moving in.
July 31, 2017
Sun halo with 2 contrail shadows
The sun is casting shadows of an aircraft contrail downwards onto thin cirrus haze layers below. Higher above, ice crystals in cirrus clouds have created a 22-degree halo around the sun.
July 31, 2017
Waxing gibbous moon this week
It's waxing toward full moon on August 7-8, obliterating the annual meteor showers and edging toward a lunar eclipse, then a solar eclipse.
July 31, 2017
This is not a mystical tree …
It’s an aerial view of glacial river patterns in Iceland. Manish Mamtani used a drone to capture this image.
July 30, 2017
More life keys in Titan’s atmosphere
Scientists expand their knowledge of the stew of ingredients in the atmosphere of Saturn's large moon Titan, and contemplate whether Titan has cooked up life.
July 29, 2017
Mercury farthest from sun July 29-30
Look for Mercury in the western twilight, starting around 45 minutes after sunset.
July 29, 2017
Moon, Jupiter and Spica on July 28
Jupiter is the brightest object in the evening sky besides the moon. Spica is a bright star in the constellation Virgo. An awesome sight!
July 28, 2017
