Tag Archives: Comet

SOLAR ECLIPSE COMET

Space Weather News for Feb. 21, 2024
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SOLAR ECLIPSE COMET: A comet is approaching the sun for a rare appearance during this April’s total solar eclipse. Cryovolcanic comet 12P/Pons-Brooks is expected to be at least faintly visible inside the Moon’s shadow with a more dramatic display possible if one of its ice geysers erupts at the right moment. Full story & sky maps @ Spaceweather.com.

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Above: Venus, Jupiter and possibly Comet 12P/Pons-Brooks will be visible during this April’s total solar eclipse

 

 

Ice volcanoes are erupting on Comet 12P

Ice volcanoes are erupting on Comet 12P

Space Weather News for Nov 15, 2023
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CRYO-VOLCANIC OUTBURST: Comet 12P/Pons-Brooks just experienced its biggest outburst yet. On Nov. 14th, the cryo-volcanic comet abruptly brightened more than 100-fold, putting it well within range of backyard telescopes. Dubbed ‘the Devil Comet’ by mainstream media, 12P might not be sprouting horns this time, indicating a new form of debris. Updates and observing tips @  Spaceweather.com.

 

Above: A previous cryo-volcanic outburst on Comet 12P/Pons-Brooks in July 2023 produced a pair of “horns.” Photo credit: Igor Smolić

 

A COMET SHAPED LIKE THE MILLENNIUM FALCON

Space Weather News for July 25, 2023
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A COMET SHAPED LIKE THE MILLENNIUM FALCON: Astronomers are monitoring a very unusual comet. A few days ago, Comet 12P/Pons-Brooks explosively brightened, spewing plumes of debris into space that now resemble a famous spaceship. No one knows for sure what happened, but it could be the eruption of an ice volcano on the comet’s surface. Full story @ Spaceweather.com.

 
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Above: A backyard telescope image of Comet 12P/Pons-Brooks on July 24, 2023. Credit: David Strange of Salcombe Regis, East Devon, UK

A LARGE COMET IS STREAKING TOWARD THE SUN

Space Weather News for Jan. 30, 2023
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https://www.spaceweatheralerts.comA LARGE COMET IS STREAKING TOWARD THE SUN: This is no ordinary flyby. Comet 96P/Machholz is streaking toward the sun for a close encounter deep inside the orbit of Mercury. 96P is unlike any other comet in the solar system, and surprises are possible when it feels the heat. Full story @ Spaceweather.com

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Above: A SOHO coronagraph image of Comet 96P/Machholz approaching the sun

THE SUN JUST BROKE A COMET’S TAIL

Space Weather News for Jan. 18, 2023
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THE SUN JUST BROKE A COMET’S TAIL: Comet ZTF (C/2022 E3) is approaching Earth and giving astronomers a better look at its tail. Surprise: It’s broken. A ‘disconnection event’ is in progress, probably caused by a CME hitting the comet. More of these events are likely to be seen as the comet approaches Earth for a close encounter on Feb. 1st. Full story @ Spaceweather.com

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Above: A disconnection event in the tail of Comet ZTF (C/2022 E3) on Jan. 17th. Credit: Michael Jaeger

VOLCANIC COMET ERUPTS AGAIN

Space Weather News for Oct. 25, 2021
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VOLCANIC COMET ERUPTS AGAIN: Volcanic comet 29P/Schwassmann-Wachmann erupted again over the weekend, suddenly brightening 10-fold and puffing a shell of vaporized cryomagma into space. The new shell is expanding into an older one produced by a “super eruption” only one month ago. Amateur astronomers are encouraged to monitor this unique object as it changes every night. Full story @ Spaceweather.com

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Above: Comet 29P photographed less than 12 hours after an eruption on Oct. 23, 2021. Credit: Jean-Francois Soulier of France.

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Huge Comet Headed our Way

Astronomers have discovered an inbound comet so large, it might be a minor planet.

A big comet like Hale-Bopp could be 50km wide–this one is about 200km wide! However, the orbit is eccentric, and it wouldn’t take much to shift it out of our solar system. –Cathypl

Space Weather News for June 23, 2021
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HUGE COMET DISCOVERY: Astronomers have discovered a comet so big, it might actually be a minor planet. The object, named 2014 UN271, is falling toward the sun for a “close approach” outside the orbit of Saturn in early 2031. Promising signs of outgassing have already been detected. Full story @ Spaceweather.com.

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Above: The orbit and a discovery image of behemoth comet 2014 UN271

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BRIGHT COMET NEARING THE SUN

BRIGHT COMET ERASMUS: Newly-discovered Comet Erasmus (C/2020 S3) is plunging toward the sun for a December close encounter inside the orbit of Mercury. Amateur astronomers report that the comet is rapidly brightening and has sprung a long tail. Check today’s edition of Spaceweather.com for the full story and observing tips.

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Above: Comet Erasmus (C/2020 S3), photographed on Nov. 18, 2020, by Gerald Rhemann of Farm Tivoli, Namibia. More: Comet Photo Gallery.

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COMET ATLAS IS COMING

Space Weather News for Nov. 10, 2020
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COMET ATLAS IS COMING: Around the world, amateur astronomers are taking incredible pictures of Comet ATLAS (C/2020 M3), which is approaching Earth for a close encounter this weekend. The big green comet is gliding through the constellation Orion, which makes it very easy to find. Bonus: If you go outside to see Comet ATLAS, you’re also likely to spot a Northern Taurid fireball. Get the full story at Spaceweather.com.

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Above: Comet ATLAS passing the Orion Nebula on Nov. 8th. Credit: Michael Jaeger of Weißenkirchen, Austra. Browse: Comet ATLAS Photo Gallery

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COMET ATLAS IS BRIGHTENING FASTER THAN EXPECTED

From Space Weather.com — CPL

COMET ATLAS IS BRIGHTENING FASTER THAN EXPECTED: Get ready for a wild ride. Comet ATLAS (C2019 Y4) is plunging toward the sun and, if it doesn’t fly apart first, it could become one of the brightest comets in years.

“Comet ATLAS continues to brighten much faster than expected,” says Karl Battams of the Naval Research Lab in Washington DC. “Some predictions for its peak brightness now border on the absurd.”


Above: Comet Atlas (upper left) glides by spiral galaxy M81 on March 18th. Credit: Rolando Ligustri [more]

The comet was discovered in December 2019 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) in Hawaii. Astronomers quickly realized it might be special. On May 31, 2020, Comet ATLAS will pass deep inside the orbit of Mercury only 0.25 AU from the sun. If it can survive the blast furnace of solar heating, it could put on a good show.

However, no one expected the show to start this soon. More than 2 months before perihelion (closest approach to the sun), Comet ATLAS is already “heating up.” The worldwide Comet Observation Database shows it jumping from magnitude +17 in early February to +8 in mid-March–a 4000-fold increase in brightness. It could become visible to the naked eye in early April.

“Right now the comet is releasing huge amounts of its frozen volatiles (gases),” says Battams. “That’s why it’s brightening so fast.”

Can ATLAS sustain this crazy pace? If it has a big nucleus w ith large stores of frozen gas, then yes; we could get a very bright comet. Otherwise, Comet ATLAS might run out of gas, crumbling and fading as it approaches the sun.
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Current best estimates of the comet’s peak brightness in May range from magnitude +1 to -5. If Comet ATLAS hits the high end of that range, a bit brighter than Venus, it could become visible in broad daylight.

Comet McNaught (C/2006 P1) performed that very trick 13 years ago. On Jan. 13, 2007, it swooped past the sun shining at magnitude -5. The absurdly-bright comet was visible at high noon with its tail jutting across blue sky:


Above: Comet McNaught in broad daylight on Jan. 13, 2007. Photo credit: Peter Rosen. [more]

Battams is not optimistic, though: “My personal intuition is that Comet ATLAS is over-achieving, and I wouldn’t be surprised to see it fade rapidly and possibly even disintegrate before reaching the sun,” he says.

Come to think of it, that would be a good show, too. Fortunately, NASA has spacecraft with cameras that specialize in seeing things close to the sun.

“The Heliospheric Imager on NASA’s STEREO spacecraft will get a great view of ATLAS from mid-May through early June,” says Battams. “The camera is very sensitive, so we might be able to observe ATLAS’s tail interacting with the solar wind and outflows–as well as any potential breakup events.”

Stay tuned!