Study Findings: An Adolescent and Near-resonant Planetary System Near the End of Photoevaporation

Posted on by onespaceman2000
Credit: Image by Adis Resic from Pixabay

Nature Astronomy abstract of study findings:

Young exoplanets provide vital insights into the early dynamical and atmospheric evolution of planetary systems. Many multi-planet systems younger than 100 Myr exhibit mean-motion resonances, probably established through convergent disk migration. Over time, however, these resonant chains are often disrupted, mirroring the Nice model proposed for the Solar System. Here we present a detailed characterization of the ~200-Myr-old TOI-2076 system, which contains four sub-Neptune planets between 1.4 and 3.5 Earth radii. We demonstrate that its planets are near to but not locked in mean-motion resonances, making the system dynamically fragile. The four planets have comparable core masses but display a monotonic increase in hydrogen and helium (H/He) envelope mass fractions (from stripped to 1%, 5% and 5%) with decreasing stellar insolation. This trend is consistent with atmospheric mass loss due to photoevaporation, which predicts that the envelopes of irradiated planets either erode completely or stabilize at a residual level of ~1% by mass within the first few hundred million years, with more distant, less-irradiated planets retaining most of their primordial envelopes. Additionally, previous detections of metastable helium outflows rule out a pure water-world scenario for the TOI-2076 planets. Our finding provides direct observational evidence that the dynamical and atmospheric reshaping of compact planetary systems begins early and offers an empirical anchor for models of their long-term evolution.

Citation: Wang, MT., Dai, F., Liu, HG. et al. An adolescent and near-resonant planetary system near the end of photoevaporation, Nat Astron (2026).

https://doi.org/10.1038/s41550-026-02795-9

Study-related stories:

Florida Tech – “Assessment of Rare Teenage Planetary System Deepens Understanding of Cosmic Evolution”

Universe Today – “Adolescence Is Tumultuous, Even For Exoplanets”

Daily Galaxy – “Scientists Discover ‘Teenage’ Planetary System, Unlocking Secrets of Cosmic Growth”

Pic of the Week: Martian Highlands

Posted on by onespaceman2000
Image (Credit): (ESA/DLR/FU Berlin)

This week’s image comes from the the European Space Agency (ESA). Captured by ESA’s orbiting Mars Express, you are looking at a portion of the crater-covered Arabia Terra, which is a large plain in Mars’s ancient highlands. You can read more about this Martian region by visiting this site.

Here is the ESA’s description of what you are viewing:

A high‑resolution overhead view of a rocky, desert‑like landscape on Mars. The surface is mostly reddish‑brown with patches of darker blue‑grey tones. Many circular impact craters of different sizes are scattered across the scene, some with raised rims and shadowed interiors. Subtle ridges, eroded valleys, and textured terrain patterns run diagonally through the image, giving a sense of ancient geological activity. The overall impression is of a dry, rugged, and heavily cratered Martian surface.

Senator Cruz Has Big Ambitions for NASA

Posted on by onespaceman2000
Image (Credit): A artist’s rendering of Nanoracks, Voyager Space, and Lockheed Martin’s Starlab commercial space station. (Nanoracks/Lockheed Martin/Voyager Space)

Senator Ted Cruz (R-TX), Chairman of the Senate Commerce, Science, and Transportation Committee, earlier today highlighted some of the sections in the NASA Authorization Act of 2026 designed to counter Chinese ambitions on the Moon while also keeping the US in the forefront of space stations.

In a Committee press release, he stated:

Let me touch on a few highlights of the NASA Authorization Act.  The bill— 

  • Directs NASA to create a permanent “moon base” so we can get there before the Chinese; 
  • Keeps American astronauts in space, extending the ISS through 2032 and requiring the launch of two independent commercial space stations before the ISS can be retired; 
  • Protects against disclosure of NASA tech secrets to Chinese spies; and 
  • Restores fiscal discipline while modernizing NASA’s workforce through public-private partnerships. 

This all sounds good, but first we need to successfully get to the Moon before worrying about permanent versus temporary Moon bases. I would rather we focus just getting a manned spacecraft back on the Moon after more than 50 years. The more burdens we place on these initial missions, the less likely we will have the chance to land on the Moon.

Mr. Musk’s complex dance with multiple Starships was designed to handle a spacecraft with four astronauts and a complex lunar habitat. A simpler mission just to replant the flag may have made more sense if the latest Space Race is about being the first to get back on the lunar surface. And if a Moon base is really a national priority, we should be able to find the funds do to both – a quick, basic mission to put boots on the lunar surface and a more complex mission supporting a Moon base. However, last year’s proposed budget cuts indicated the White House doesn’t know what it wants.

In terms of a space station, the idea of getting more years out of the enormous investment in the International Space Station makes perfect sense. That said, requiring long-term investment from the commercial sector for space stations seems presumptuous. While NASA can support the design of future stations, it cannot ensure their construction and viability. Besides, it is not clear we have enough research, both government and commercial, to support one space station. Do we really need two? And should that be NASA’s decision?

I believe the private sector can decide on the need for space stations all by itself, and so far it has not shown enough interest in this area. The government is good at big things, while the private sector has very specific profit-driven interests when it comes to space missions, like anything else. So far, the commercial funding seems to be drifting towards orbiting data centers and even space tourism. Is this what Senator Cruz envisions?

We may need to simplify our milestones if we are trying to beat the Chinese and maintain our presence in space. Big ideas need to be supported with big budgets and/or clear private sector benefits. With the current administration starting costly wars around the world while also sending mixed signals to the private sector via excessive tariffs and various crony-capitalist actions, we will be lucky to keep the lights on at NASA.

Podcast: Jerod Isaacman Speaks with Ross Douthat

Posted on by onespaceman2000
Image (Credit): NASA Administrator Jared Isaacman and New York Times columnist Ross Douthat speaking on the Interesting Times program. (New York Times)

New York Times columnist Ross Douthat sat down with NASA Administrator Jared Isaacman recently to discuss the future of NASA and more. You can listen to the interview, titled ‘The New Space Race,” via the New York Times‘ Interesting Times podcast or watch it on YouTube.

I was a little skeptical about what I would learn from NASA’s new administrator, a billionaire space tourist until recently, but Jared Isaacman was well spoken during the interview. He seemed both candid with his answers as well as well comfortable with everything Ross tossed his way. His only stumble in my opinion was when he was trying to cover for the proposed draconian cuts to NASA by the White House in 2025. Fortunately, Congress saved the agency and his butt, though you would not know that from his answer.

I particularly liked his openness about his own space travels as well as the return mission to the Moon. In terms of himself, he compared his own gravity-free experience in space as the equivalent of being an upside down chipmunk. He also did not appear overwhelmed by his privileged view of the Earth from low Earth orbit. He said the high-definition images from the International Space Station (ISS) over the years has given everyone a great view of the Earth.

As far as establishing an early settlement on the Moon, he did not try to oversell it. He stated:

For the first maybe, I don’t know, 10 years, it’s going to look like a pretty cool futuristic junkyard with lots of landers and rovers around.

Mr. Isaacman also restated his critique of NASA’s handing of the Boeing Starliner mission to the ISS, did not exaggerate the profits to be made in space at the moment, expressed his opinions on intelligent life elsewhere as well as the public’s interest in UFOs, and stated he expected a manned mission to land on Mars within about 10 years.

Check it out for yourself if you want to learn a little more about the man running NASA. The interview runs for about an hour.

Space Stories: Rubin Observatory Data Alerts, Upcoming Total Lunar Eclipse, and Exoplanet Astronomer Murdered

Posted on by onespaceman2000
Image (Credit): The Rubin Observatory. (Rubin Obs./NSF/AURA)

Here are some recent space-related stories of interest.

—GeekWire: “Rubin Observatory Sends Out Thousands of Data Alerts with an Assist from Seattle Astronomers“

An astronomical alert system developed at the University of Washington started off with a bang this week, sending out 800,000 notifications about moving asteroids, exploding stars and other celestial changes detected by the Vera C. Rubin Observatory in Chile. Tuesday night’s surge was just the first wave of alerts. Eventually, the Alert Production Pipeline is expected to produce up to 7 million alerts per night. Astronomers around the globe will use the system to sift through the torrent of data, zeroing in on events ranging from newly detected asteroids to supernovas, variable stars and active galactic nuclei.

—Sky&Telescope: “Get Ready for the March 3, 2026, Predawn Total Lunar Eclipse“

On Tuesday, March 3rd, the full Moon glides through the darkest portion of Earth’s shadow, called the umbra, to create a dramatic total lunar eclipse. In the Western Hemisphere, the event occurs in the hours before dawn, while across Asia it happens during the evening. During the eclipse, Earth’s shadow is seen gradually edging across the face of the full Moon until the entire lunar disk glows deep orange or red. Then the sequence of events unfolds in reverse order, until the shadow leaves the lunar disk completely and the Moon returns to full brilliance.

—Futurism: “Astronomer Who Discovered Water on Distant Planet Murdered Outside Home“

A renowned Caltech astronomer who studied distant exoplanets was shot and killed outside his home in a rural area near Los Angeles, the LA Times reported…Among his most notable contributions to the field was leading research published in 2007 that, for the first time, captured enough light from distant exoplanets to identify the molecules in their atmospheres…and soon made the “monumental” discovery of detecting signs of water on another planet