It swept nearest the sun in September, then sped away again, back to interstellar space. Astronomers named it `Oumuamua. It's dark red, very elongated and unlike anything in our solar system.
The auroras over Earth's north and south poles typically mirror each other. But X-ray observations show that Jupiter's auroras pulsate on different timescales.
“That’s the Earth, breathing every single day, changing with the seasons, responding to the sun, to the changing winds, ocean currents and temperatures."
This star has a spiral disk of dust around it. Processes in the inner disk - winds, or swirls or clashes of pebbles - seem to be casting shadows on the outer disk.
Spectacular Venus-Jupiter conjunction on Monday! These are the 2 brightest planets, and they'll be less than a moon-width apart. If you do miss them on Monday, keep watching. The moon is about to sweep past them.
We published a photo last Tuesday, showing a mountain's shadow. We wondered what caused it. Now - with the help of the EarthSky community - the mystery may be solved.
Deborah Byrd (asteroid 3505 Byrd) helps edit EarthSky.org and is a frequent host of EarthSky videos. Deborah created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Prior to that, she had worked for the University of Texas McDonald Observatory since 1976, and created and produced their Star Date radio series. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named in her honor in 1990, a Public Service Award from the National Science Board in 2003, and the Education Prize from the American Astronomical Society in 2020. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.
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