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Five years ago, NASA’s infrared Spitzer Space Telescope helped discover a family of seven rocky exoplanets orbiting the same star, known as TRAPPIST-1. Now, NASA’s new infrared powerhouse — the James Webb Space Telescope (JWST) — measured the temperature of one of those worlds, TRAPPIST-1b, in new research published in the journal Nature (opens in new tab) . 

The bad news: The Earth-like planet is almost certainly uninhabitable.

Astronomers used JWST’s mid-infrared camera, called MIRI, to look for the planet’s thermal emission — think heat-sensing “Terminator” vision. They found that TRAPPIST-1b is scorching — about 450 degrees Fahrenheit (232 degrees Celsius), about the temperature of an oven — and that it likely lacks an atmosphere.

The discovery is another record-breaking first for the JWST, which has been steadily producing newsworthy results since its launch. 

Related: 25 jaw-dropping James Webb Space Telescope images 

“This is the first detection of any form of light emitted by an exoplanet as small and as cool as the rocky planets in our own solar system,” NASA officials said in a statement (opens in new tab) .

“No previous telescopes have had the sensitivity to measure such dim mid-infrared light,” Thomas Greene (opens in new tab) , a NASA astrophysicist and lead author of the new work, said in the statement. 

The initial discovery of the seven TRAPPIST-1 exoplanets spurred great excitement in the astronomical community, since all of the distant worlds are about the size of Earth and are located in their star’s habitable zone, the region that’s just the right distance from a star for liquid water to exist on a planet’s surface. This system is “a great laboratory” and “the best targets we have for looking at the atmospheres of rocky planets,” study co-author Elsa Ducrot (opens in new tab) , an astronomer with the French Alternative Energies and Atomic Energy Commission (CEA), said in the statement.

Don’t get too excited about a new world for humans yet, though — the TRAPPIST-1 planets are out of our current reach, at a whopping 235 trillion miles (378 trillion kilometers) away. They’re also orbiting a star much smaller and redder than our sun, known as an M dwarf star.

“There are ten times as many of these stars in the Milky Way as there are stars like the sun, and they are twice as likely to have rocky planets as stars like the sun,” Greene said. 

These abundant M dwarfs are obvious targets for astronomers seeking habitable planets, and it’s conveniently easier to observe rocky planets around these smaller stars. There’s one catch, though: M dwarfs are much more active than our sun, often flaring and spewing high-energy rays that could be damaging to budding extraterrestrial life or to a planet’s atmosphere.related stories—Monster black hole may have killed this galaxy’s star-forming power, James Webb Telescope reveals

—The James Webb Telescope detected the coldest ice in the known universe – and it contains the building blocks of life

—James Webb Space Telescope captures star going supernova in a dazzling cloud of dust

Previous observations of TRAPPIST-1b weren’t sensitive enough to determine if it had an atmosphere after all, or if it was a barren rock. The planet is tidally locked to its star, meaning one side always faces its star and the other is stuck in perpetual night. Simulations suggest that if this world had an atmosphere, the planet’s temperature would be lower, as the air would redistribute the heat around both sides. The JWST recorded a significantly hotter temperature, though — indicating no atmosphere and knocking one more planet off humanity’s list of possibly habitable worlds.

The real excitement here, however, isn’t really the specifics of TRAPPIST-1b. Instead, the crucial takeaway is that the JWST is capable of these kinds of measurements and will continue to make more of them, exploring the atmospheres and temperatures of many other worlds.

“There was one target that I dreamed of having, and it was this one,” study co-author Pierre-Olivier Lagage (opens in new tab) , also with CEA, said in the statement. Lagage is one of the developers of MIRI, the instrument that made these observations. “This is the first time we can detect the emission from a rocky, temperate planet. It’s a really important step in the story of discovering exoplanets.”

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Sources: Rangers, Mets to swap Semien, Nimmo

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Sources: Rangers, Mets to swap Semien, Nimmo

The New York Mets and Texas Rangers have agreed to a trade that would send second baseman Marcus Semien to the Mets and outfielder Brandon Nimmo to the Rangers, sources told ESPN on Sunday.

Nimmo agreed to waive his no-trade clause, sources said, allowing the deal to be consummated, pending MLB approval. His tenure with the Mets started when they chose him with the 13th overall pick in the 2011 draft.

Semien, a three-time All-Star, joined the Rangers in 2022 and won a World Series with them the next season.

Texas entered the offseason looking for areas to save money, with its payroll being cut and four players — Semien, shortstop Corey Seager, and right-handers Jacob deGrom and Nathan Eovaldi — set to make in excess of $25 million next year. While the Rangers will actually take on more long-term money in Nimmo, who is owed $101.25 million over the next five seasons, the per-year sum is lower, with Semien set to make $72 million for the next three seasons.

The trade is the first move in what’s expected to be a busy winter for both teams — particularly the Mets. As a result of the team’s slow collapse over the season’s final 3½ months, New York missed the postseason and eventually underwent significant turnover in its coaching staff. The acquisition of Semien — who won a Gold Glove this year — aligns with president of baseball operations David Stearns’ primary goal this winter of improving run prevention.

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US hails ‘tremendous progress’ on Ukraine peace plan – but says negotiators ‘need more time’

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US hails 'tremendous progress' on Ukraine peace plan - but says negotiators 'need more time'

The US secretary of state has hailed a “tremendous amount of progress” on peace talks after the US and Ukraine delegations met in Geneva – but said that negotiators would “need more time”.

Marco Rubio said the meetings in Switzerland on Sunday have been “the most productive and meaningful” of the peace process so far.

He said the US was making “some changes” to the peace plan, seemingly based on Ukrainian suggestions, “in the hopes of further narrowing the differences and getting closer to something that both Ukraine and obviously the United States are very comfortable with”.

Mr Rubio struck an optimistic tone talking to the media after discussions but was light on the details, saying there was still work to be done.

US secretary of state Marco Rubio in Geneva after peace talks with Ukraine. Pic: Reuters
Image:
US secretary of state Marco Rubio in Geneva after peace talks with Ukraine. Pic: Reuters

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Analysis: Rubio strikes an optimistic tone – but is light on detail

“I don’t want to declare victory or finality here. There’s still some work to be done, but we are much further ahead today at this time than we were when we began this morning and where we were a week ago for certain,” Mr Rubio said.

He also stressed: “We just need more time than what we have today. I honestly believe we’ll get there.”

Sky News’ defence analyst Michael Clarke said on the initial US-Russian 28-point peace plan that it was Donald Trump against the world, with maybe only Moscow on his side.

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Is Trump’s plan a ‘capitulation document’?

Mr Rubio praised the Ukrainian attitude towards the talks and said Mr Trump was “quite pleased” after he previously said in a social media post that Ukraine’s leaders had expressed “ZERO GRATITUDE” for US efforts.

Ukrainian President Volodymyr Zelenskyy said in his nightly address on Sunday that there are signs that “President Trump’s team hears us”.

In a news release on Sunday evening, the White House said the day “marked a significant step forward”.

“Ukrainian representatives stated that, based on the revisions and clarifications presented today, they believe the current draft reflects their national interests and provides credible and enforceable mechanisms to safeguard Ukraine’s security in both the near and long term,” it claimed.

Despite diplomatic progress in Geneva the finish line remains a long way off


John Sparks

John Sparks

International correspondent

@sparkomat

We’ve witnessed a day of determined and decidedly frantic diplomacy in this well-heeled city.

Camera crews were perched on street corners and long convoys of black vehicles swept down Geneva’s throughfares as the Ukrainians worked hard to keep the Americans on side.

Secretary of state Marco Rubio did not want to go into details at a press “gaggle” held at the US Mission this evening, but he seemed to think they had made more progress in the last 96 hours than the previous 10 months combined.

The Ukrainian leader Volodymyr Zelenskyy also seemed satisfied enough, posting on Telegram that there were “signals President Trump’s team is hearing us” after a day of “numerous meetings and negotiations”.

That said, we are a long way from the finish line here – something Rubio acknowledged when he said that any proposal agreed here would have to be handed over to the Russians.

At that point, negotiations to stop the war would surely get tougher.

President Putin has shown little or no inclination to stop the conflict thus far.

This, then, is the most important reason the Ukrainians seem determined to keep the Americans on side.

European leaders have presented a counter proposal to the widely criticised US-Russian peace plan, with suggestions including a cap on Ukraine’s peacetime army and readmitting Moscow into the G8.

This will only take place if the plan is agreed to by the US, Russia and Ukraine, and the G7 signs off on the move. Russia was expelled after annexing Crimea in 2014.

The counter proposal also includes US guarantees to Ukraine that mirror NATO’s Article 5 – the idea that “an armed attack against one NATO member shall be considered an attack against them all”.

The initial peace plan was worked up by the White House and Kremlin without Ukraine’s involvement, and it acquiesces to many of Russia’s previous demands.

Read more:
Who actually wrote US-Russian peace plan for Ukraine?
In full: Europe’s 28-point counter proposal to US-Russia plan

It covers a range of issues – from territorial concessions to reconstruction programmes, the future Ukrainian relationship with NATO and the EU, and educational reforms in both Ukraine and Russia.

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Technology

Google’s new AI model puts OpenAI, the great conundrum of this market, on shakier ground

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Google's new AI model puts OpenAI, the great conundrum of this market, on shakier ground

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