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EarthSky
Updates on your cosmos and world.
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EarthSky 8h
A visible-light image of the Fireworks Galaxy, overlaid with data from NASA's NuSTAR X-ray telescope. The mystery green blob is toward the middle of the galaxy, apparently coincident with one of its spiral arms. Image via NASA/ JPL-Caltech. Read more
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EarthSky 8h
The Hubble Space Telescope’s Wide Field Camera 3 observed Saturn on June 20, 2019. That was shortly before Earth flew between Saturn and the sun on July 9: πŸ›° Image via NASA/ESA/A. Simon/M.H. Wong/Spacetelescope.org. πŸ“Έ
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EarthSky 16h
Carbon dioxide's outsized influence on Earth's climate 🌎 Carbon dioxide, CO2, makes up less than one-twentieth of 1% of Earth's atmosphere. How does this scarce gas control Earth's thermostat? An environmental scientist explains: Image via NASA/JPL.
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EarthSky 18h
We have an equinox coming up on September 23. In the Northern Hemisphere, the sun is rising later, and nightfall comes sooner. At the equinox, days and nights will be approximately equal in length. 🌌 Here's all you need to know: Image via Lee Capps. πŸ“Έ
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EarthSky 20h
Meet Fomalhaut, a bright star and one of the easiest stars to find at this time of year. It's sometimes said to be lonely, but in 2019 Fomalhaut has company: Jupiter and Saturn. ⭐️ How to see Fomalhaut: πŸ‘€ Image via Tony Gieracki. πŸ“Έ
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EarthSky Sep 15
Oh my! 😱 Like this photo? It's a sea otter in Seward, Alaska, caught by Harry Walker. It was one of 40 finalists in this year's Affinity Photo People's Choice Awards. πŸ“Έ See more finalist photos, and vote, here:
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EarthSky Sep 15
Look west after sunrise for the daytime moon πŸŒ„πŸŒ• Paul Schulz caught the moon just past full - this time a year ago, September 2018 - above and behind Mt. Graham in Arizona. Thanks, Paul! πŸ“Έ Read more: πŸ‘“ View larger:
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EarthSky Sep 15
It was exciting last week when scientists announced water vapor in a super-Earth's atmosphere. But other scientists said that the planet is probably less like a super-Earth and more like a planet Neptune. πŸ€” Read more: πŸ‘“ Image via Alex Boersma/iREx.
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EarthSky Sep 15
Astronomers have a new name for these sorts of flares from supermassive black holes in distant galaxies: they're calling them quasi-periodic eruptions. 🌌⚫️ Read more: πŸ‘“ Image via ESA/XMM-Newton; NASA/CXC; G. Miniutti (CAB, CSIC-INTA, Spain).
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EarthSky Sep 15
UCLA astronomers announced last week that - in May - they caught the supermassive black hole at the center of our Milky Way galaxy having an unusually large meal of gas and dust. 🌌⚫️ Read more and watch a video: πŸ‘“πŸ‘€ Image via Nicolle Fuller/NSF.
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EarthSky Sep 13
Venus and Mercury conjunction last night - 8 degrees from the sunset - captured by Helio Vital in Rio. Venus is the brighter object above and to the right of the tall pole. Mercury is the fainter object, left of the pole, about midway up. Read more:
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EarthSky Sep 13
The Hubble Space Telescope observed Saturn on June 20, 2019. That was shortly before Earth flew between Saturn and the sun on July 9. Image via NASA/ESA/A. Simon/M.H. Wong/HST. By the way, Saturn is still in the evening sky. πŸ“Έ Read more: πŸ‘“
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EarthSky Sep 13
Memorial lights over NYC πŸ™ Taken by Gabriel Rivas at 7th Avenue South & Grove Street, New York, NY. He wrote: "You can just make out a planet (Saturn?) through the World Trade Center memorial lights." View at EarthSky Community Photos: πŸ“Έ
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EarthSky Sep 13
Today is 2019's first Friday the 13th 😱 13 weeks after today, 2019's second Friday the 13th will fall in December. Zoinks! By the way, an irrational fear of Friday the 13th is called friggatriskaidekaphobia. Read more: πŸ‘“ Image via les affaires. πŸ“Έ
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EarthSky Sep 13
Most popular at EarthSky this morning ... A newly discovered object that appears to have come from interstellar space. If confirmed, this object - labled C/2019 Q4 - would be only the second one known so far. β˜„οΈ How cool is that? Read more: πŸ‘“
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EarthSky Sep 13
Replying to @JudyDarnell
The linked article tells a lot more about it:
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EarthSky Sep 12
Kristopher Schoenleber captured this image of Emerald Lake in Yoho National Park, British Columbia, Canada on September 1. "Once sunset began a hail storm broke out, fog and clouds rolled in, thunder erupted, and the lightning flashed up in the mountains ... "
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EarthSky Sep 12
These next several nights, look for a full-looking moon to light up the nighttime sky from dusk until dawn. Read more Image via Heidi Gabbert of San Jose, California.
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EarthSky Sep 12
Taken last night by Gabriel Rivas at 7th Avenue South & Grove Street, New York, NY. He wrote: "You can just make out a planet (Saturn?) through the World Trade Center memorial lights. 9/11/19, 7:49 p.m." View at EarthSky: Gabriel:
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EarthSky Sep 12
The complex radio emission from the galactic center, as imaged by the South African MeerKAT telescope. The newly-discovered giant radio bubbles are the structures running top to bottom in this image. Read more Image via SARAO/Oxford.
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