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Hubble snaps

Hubble snaps close-up of comet NEOWISE – Phys.org

Hubble snaps close-up of comet NEOWISE
The NASA/ESA Hubble Space Telescope has captured the closest images yet of the sky’s latest visitor to make the headlines, comet C/2020 F3 NEOWISE, after it passed by the Sun. This color image of the comet was taken on 8 August 2020.The two structures appearing on the left and right sides of the comet’s center are jets of sublimating ice from beneath the surface of the nucleus, with the resulting dust and gas bring squeezed through at a high velocity. The jets emerge as cone-like structures, then are fanned out by the rotation of the comet’s nucleus. Credit: NASA, ESA, Q. Zhang (California Institute of Technology), A. Pagan (STScI)

The NASA/ESA Hubble Space Telescope has captured the closest images yet of the sky’s latest visitor to make the headlines, comet C/2020 F3 NEOWISE, after it passed by the Sun. The new images of the comet were taken on 8 August and feature the visitor’s coma, the fine shell that surrounds its nucleus, and its dusty output.

Comet NEOWISE is the brightest visible from the Northern Hemisphere since 1997’s Hale-Bopp comet. It’s estimated to be travelling at over 60 kilometres per second. The comet’s to the Sun was on 3 July and it’s now heading back to the outer reaches of the Solar System, not to pass through our neighbourhood again for another 7000 years.

Hubble’s observation of NEOWISE is the first time a comet of this brightness has been photographed at such high resolution after its pass by the Sun. Earlier attempts to photograph other bright comets (such as comet ATLAS) proved unsuccessful as they disintegrated in the searing heat.

Comets often break apart due to thermal and gravitational stresses at such close encounters, but Hubble’s view suggests that NEOWISE’s solid stayed intact. This heart of the comet is too small to be seen directly by Hubble. The ball of ice may be no more than 4.8 kilometres across. But the Hubble image does captures a portion of the vast cloud of gas and enveloping the nucleus, which measures about 18 000 kilometres across in this image.





The NASA/ESA Hubble Space Telescope has captured the closest images yet of the sky’s latest visitor to make the headlines, comet C/2020 F3 NEOWISE, after it passed by the Sun. The two images in this video were take three hours apart on 8 August 2020 and features the comet’s prominent jets that are emerging from the nucleus. Credit: NASA, ESA, Q. Zhang (California Institute of Technology), A. Pagan (STScI), and M. Kornmesser

Hubble’s observation also resolves a pair of jets from the nucleus shooting out in opposite directions. They emerge from the comet’s core as cones of dust and gas, and then are curved into broader fan-like structures by the rotation of the nucleus. Jets are the result of ice sublimating beneath the surface with the resulting dust/gas being squeezed out at .

Hubble snaps close-up of celebrity comet NEOWISE
This ground-based image of comet C/2020 F3 (NEOWISE) was taken from the Northern Hemisphere on July 16, 2020. The inset image, taken by the Hubble Space Telescope on Aug. 8, 2020, reveals a close-up of the comet after its pass by the Sun. Hubble’s image zeroes in on the comet’s nucleus, which is too small to be seen. It’s estimated to measure no more than 3 miles (4.8 kilometers) across. Instead, the image shows a portion of the comet’s coma, the fuzzy glow, which measures about 11,000 miles (18,000 kilometers) across in this image. Comet NEOWISE won’t pass through the inner solar system for another nearly 7,000 years. Credit: NASA, ESA, STScI, Q. Zhang (Caltech); ground-based image copyright © 2020 by Zoltan G. Levay, used with permission

The Hubble photos may also help reveal the colour of the comet’s dust and how that colour changes as the comet moves away from the Sun. This, in turn, may explain how solar heat affects the contents and structure of that dust and the comet’s coma. The ultimate goal here would be to determine the original properties of the dust. Researchers who used Hubble to observe the comet are currently delving further into the data to see what they’re able to find.

Hubble has captured other well-known comet visitors throughout the past year. This includes snapping images of the breakup of comet ATLAS in April 2020 and impressive images of the interstellar comet 2I BORISOV in October 2019 and December 2019.



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Hubble snaps close-up of comet NEOWISE (2020, August 21)
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Pelosi snaps

Pelosi snaps at reporter over Biden allegation, doubles down on support: ‘I don’t need a lecture’ – Fox News

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House Speaker Nancy Pelosi, D-Calif., doubled down on her support for Joe Biden on Thursday in the face of a sexual assault allegation against him and had a contentious response to a reporter who asked whether she was treating Biden differently than Supreme Court Justice Brett Kavanaugh.

During her Capitol press conference, the first question to the speaker was about Biden, but Pelosi shut down the reporter, saying she first wanted to address the topic on hand — expanding broadband access as part of the broader coronavirus stimulus measures.

At the end of the press conference, after Pelosi has spoken thoroughly about her legislative priorities, the reporter brought up the sexual assault allegation from Tara Reade against the presumptive Democratic presidential nominee. The Washington Examiner’s Kerry Picket asked whether Democrats had a different “standard” for Biden than for Kavanaugh, for whom Democrats were demanding an FBI investigation over an alleged assault when he was a teenager.

“I respect your question,” Pelosi told the reporter. “I don’t need a lecture or a speech.”

PELOSI SAYS SHE IS ‘SATISFIED’ WITH BIDEN’S RESPONSE TO SEXUAL ASSAULT ALLEGATION

Pelosi said she supports the #Metoo movement that gave way to victims of sexual harassment speaking out against powerful politicians, celebrities and media figures, but she said she stands by Biden.

“There is also due process. And the fact that Joe Biden is Joe Biden,” Pelosi said.

Pelosi said there are statements from former Biden employees who don’t corroborate the allegation from Reade, a former Senate staffer, at the time. (However, in recent weeks Reade’s story has gotten additional support from people she allegedly told at the time.)

“There was never any record of this, there was never any record,” Pelosi said. “And that nobody ever came forward or nobody ever came forward to say something about it apart from the principal involved.”

“I am so proud — the happiest day for me this week was to support Joe Biden for president of the United States. He’s a person of great integrity,” Pelosi said.

The House speaker cited Biden authoring the Violence Against Women Act when he was in the Senate as a testament to his character.

“I believe that he will be a great president of the United States. He is the personification of hope and optimism and authenticity for our country — a person of great values. So I’m going to remove all doubt in anyone’s mind. I have [a] great comfort level with the situation as I see it, with all the respect in the world for any woman who comes forward [and] with all the highest regard for Joe Biden.

“And that’s what I have to say about that,” Pelosi said, before walking off the stage and ending her press conference.

Earlier Thursday, Pelosi said she was “satisfied” with how Biden has responded to sexual assault allegations made against him by the former staffer — even as new revelations have emerged that appear to bolster the accuser’s claims.

“Well, I have great sympathy for any woman who brings forth an allegation; I’m a big strong supporter of the #MeToo movement. I think it’s made a great contribution to our country and I do support Joe Biden,” Pelosi said on CNN. “I’m satisfied with how he has responded, I know him, I was proud to endorse him Monday, very proud to endorse him, so I’m satisfied with that.”

PELOSI ENDORSES BIDEN FOR PRESIDENT, AMID DEVELOPMENT IN SEXUAL ASSAULT CLAIM

The comments were her first on the matter since her Biden endorsement.

It echoes remarks she made on MSNBC on April 17, when she was asked if she was satisfied with Biden’s answer: “Yes, I am. I am very much involved in this issue. I always want to give the opportunity that women deserve to be heard. I am satisfied with his answer, yes.”

Biden, however, has not personally said anything about the accusation, relying instead on his campaign to deny it.

Reade, a former Biden staffer, has accused him of sexually assaulting her in 1993. The campaign referred Fox News to a statement earlier this month from Biden’s deputy campaign manager Kate Bedingfield that said: “What is clear about this claim: it is untrue. This absolutely did not happen.”

Reade’s allegations have received some support in the form of a resurfaced “Larry King Live” interview that appears to show Reade’s mother referring to the accusation, albeit in vague terms. Additionally, two more people who knew Reade have come forward to say she told them about the allegation at the time.

Reade’s story first resurfaced in an article in The Intercept on March 24. Podcast host Katie Halper then interviewed Reade, who said that, in 1993, a more senior member of Biden’s staff asked her to bring the then-senator his gym bag near the U.S. Capitol building, which led to the encounter in question.

“He greeted me, he remembered my name, and then we were alone. It was the strangest thing,” Reade told Halper. “There was no, like, exchange really. He just had me up against the wall.”

She continued: “His hands were on me and underneath my clothes, and he went down my skirt and then up inside it and he penetrated me with his fingers and he was kissing me at the same time and he was saying some things to me.”

DEM VP SHORTLISTERS CONDEMNED KAVANAUGH: HERE’S THEIR RESPONSE TO BIDEN ACCUSATION

Reade said she tried to share her story last year, but nobody listened to her. Earlier this month, she filed a criminal complaint against Biden with police in Washington, D.C.

Fox News’ Adam Shaw contributed to this report.

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