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Jasonhar

30 Oct 2025 - 07:44 pm

Astronomers first discovered Cha 1107-7626 in 2008, and since then, they have observed it with different telescopes to learn more about how the infant planet evolves, as well as to study its surroundings.
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The research team observed the planet with Webb in 2024, making a clear detection of the surrounding disk. Next, the researchers studied it using the X-shooter spectrograph on the Very Large Telescope, which can capture different wavelengths of light emitted by an object ranging from ultraviolet to near-infrared.

The observations detected a puzzling event as the planet transitioned from a steady accretion rate in April and May to a burst of growth between June and August.
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“I fully expected that this is a short-term event, because those are much more common,” Scholz said. “When the burst kept going through July and August, I was absolutely stunned.”

Follow-up observations made using the Webb telescope also showed that the chemistry of the disk had changed. Water vapor, present during the growth spurt, wasn’t in the disk before. Webb is the only telescope capable of capturing such detailed changes in the environment for such a faint object, Scholz said. Prior to this research, astronomers had only ever seen the chemistry of a disk change around a star, but not around a planet.

Comparing observations from before and during the event showed that magnetic activity seems to be the main driver behind how much gas and dust is falling on the planet — a phenomenon typically associated with stars as they grow.

But the new observations suggest that objects with much less mass than stars — the rogue world is less than 1% the mass of our sun — can have strong magnetic fields capable of driving the growth of the object, according to the study authors.

An infrared image taken with the Visible and Infrared Telescope for Astronomy shows Cha 1107-7626, a dot located in the center.
An infrared image taken with the Visible and Infrared Telescope for Astronomy shows Cha 1107-7626, a dot located in the center. ESO/Meingast et al.
A planet that acts like a star
The origin of rogue planets remains murky. It’s possible they are planets that are kicked out of orbit around stars due to the gravitational influence of other objects. Or perhaps they are the lowest-mass objects that happen to form like stars. For Cha 1107-7626, astronomers said they think it’s the latter.

“This object most likely formed in a way similar to stars — from the collapse and fragmentation of a molecular cloud,” Scholz said.

A molecular cloud is a massive, cold cloud of gas and dust that can stretch for hundreds of light-years, according to NASA.

“We’re struck by quite how much the infancy of free-floating planetary-mass objects resembles that of stars like the Sun,” Jayawardhana said in a statement. “Our new findings underscore that similarity, and imply that some objects comparable to giant planets form the way stars do, from contracting clouds of gas and dust accompanied by disks of their own, and they go through growth episodes just like newborn stars.”

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30 Oct 2025 - 01:17 pm

He has had more cordial, more productive, meetings with US President Donald Trump since that now-notorious encounter on February 28.
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But for Ukrainian President Volodymyr Zelensky, today’s meeting at the White House will surely trigger awkward memories of that very public clash with the US President almost six months ago. Navigating the treacherous waters in which he finds himself today will be no easier.
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Increasingly, it appears likely he will be told to give up land in exchange for some sort of security guarantees.

The land side of that “deal” will be obvious. It can be drawn on a map. Crimea: gone, says Trump. Donetsk: give all of it up, says Putin, apparently with Trump’s blessing.

But the security guarantees? That’s where far more challenging ideas, like credibility, come into play. Could Zelensky rely on the US to deliver on some NATO Article 5-type promise, to defend Ukraine if Russia breaches any peace agreement?

Putin himself might even see an opportunity to further weaken the West, by testing any such guarantees, confident they are a bluff he could call. But all that would be for the future.

For now, it looks like Zelensky will have to weigh up whether he could bring his country with him if he were to cede territory to Russia – some of it still in Ukrainian hands – or whether he and his people could bear the costs of potentially defying Trump a Nobel Peace Prize, and say no.

If he chose the latter, would the US President immediately end all remaining American support for Ukraine, in terms of military aid and intelligence sharing, for instance?

If that happened, to what extent could Zelensky’s European allies really step in and fill in the gaps left by any full US retreat?

It is an almost impossibly hard choice before him.
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30 Oct 2025 - 01:15 pm

He has had more cordial, more productive, meetings with US President Donald Trump since that now-notorious encounter on February 28.
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But for Ukrainian President Volodymyr Zelensky, today’s meeting at the White House will surely trigger awkward memories of that very public clash with the US President almost six months ago. Navigating the treacherous waters in which he finds himself today will be no easier.
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Increasingly, it appears likely he will be told to give up land in exchange for some sort of security guarantees.

The land side of that “deal” will be obvious. It can be drawn on a map. Crimea: gone, says Trump. Donetsk: give all of it up, says Putin, apparently with Trump’s blessing.

But the security guarantees? That’s where far more challenging ideas, like credibility, come into play. Could Zelensky rely on the US to deliver on some NATO Article 5-type promise, to defend Ukraine if Russia breaches any peace agreement?

Putin himself might even see an opportunity to further weaken the West, by testing any such guarantees, confident they are a bluff he could call. But all that would be for the future.

For now, it looks like Zelensky will have to weigh up whether he could bring his country with him if he were to cede territory to Russia – some of it still in Ukrainian hands – or whether he and his people could bear the costs of potentially defying Trump a Nobel Peace Prize, and say no.

If he chose the latter, would the US President immediately end all remaining American support for Ukraine, in terms of military aid and intelligence sharing, for instance?

If that happened, to what extent could Zelensky’s European allies really step in and fill in the gaps left by any full US retreat?

It is an almost impossibly hard choice before him.
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Jamesbes

30 Oct 2025 - 01:04 pm

He has had more cordial, more productive, meetings with US President Donald Trump since that now-notorious encounter on February 28.
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But for Ukrainian President Volodymyr Zelensky, today’s meeting at the White House will surely trigger awkward memories of that very public clash with the US President almost six months ago. Navigating the treacherous waters in which he finds himself today will be no easier.
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Increasingly, it appears likely he will be told to give up land in exchange for some sort of security guarantees.

The land side of that “deal” will be obvious. It can be drawn on a map. Crimea: gone, says Trump. Donetsk: give all of it up, says Putin, apparently with Trump’s blessing.

But the security guarantees? That’s where far more challenging ideas, like credibility, come into play. Could Zelensky rely on the US to deliver on some NATO Article 5-type promise, to defend Ukraine if Russia breaches any peace agreement?

Putin himself might even see an opportunity to further weaken the West, by testing any such guarantees, confident they are a bluff he could call. But all that would be for the future.

For now, it looks like Zelensky will have to weigh up whether he could bring his country with him if he were to cede territory to Russia – some of it still in Ukrainian hands – or whether he and his people could bear the costs of potentially defying Trump a Nobel Peace Prize, and say no.

If he chose the latter, would the US President immediately end all remaining American support for Ukraine, in terms of military aid and intelligence sharing, for instance?

If that happened, to what extent could Zelensky’s European allies really step in and fill in the gaps left by any full US retreat?

It is an almost impossibly hard choice before him.
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30 Oct 2025 - 12:14 pm

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