30 Years, 1000s of Worlds: Why 2025 Was a Turning Point for Exoplanet Discovery

Abstract

The year 2025 marked a pivotal moment in the history of astronomy, coinciding with the thirtieth anniversary of the first confirmation of an exoplanet orbiting a Sun-like star. This review article provides a comprehensive synthesis of the major exoplanetary discoveries and astrobiological developments that defined the year. From the identification of the nearby super-Earth Gliese 251 c to the contentious debates surrounding the "Hycean" world K2-18b, 2025 was characterized by a shift from mere detection to deep atmospheric characterization and theoretical reassessment. We examine the transformative data returned by the James Webb Space Telescope (JWST), the European Space Agency’s Gaia and CHEOPS missions, and ground-based observatories. Special attention is paid to the emerging paradoxes in planetary habitability, the influence of stellar activity on atmospheric retention, and the newly validated mechanisms of star-planet interaction. This report also analyzes the broader implications of these findings for the search for life, culminating in the strategic pivots of major space agencies toward the Habitable Worlds Observatory and the next generation of life-detection missions.

1. Introduction: Three Decades of Exoplanet Discovery

1.1 The Evolution of a Discipline

In October 1995, astronomers Michel Mayor and Didier Queloz announced the discovery of 51 Pegasi b, a "hot Jupiter" that defied the then-standard models of planetary formation.¹ That singular data point shattered humanity’s solipsistic view of the cosmos, proving that the solar system was not the only architecture for planetary systems. Thirty years later, in 2025, the field of exoplanetary science has matured from a hunt for anomalies into a rigorous statistical and physical discipline. By the close of the year, the count of confirmed exoplanets surpassed 6,000, a milestone that reflects the cumulative success of missions like Kepler, TESS (Transiting Exoplanet Survey Satellite), and the increasing precision of ground-based radial velocity surveys.¹

However, the sheer number of planets is no longer the primary metric of success. The narrative of 2025 was defined by characterization—the ability to probe the atmospheres, interiors, and orbital dynamics of these distant worlds with unprecedented clarity. The tools available to astronomers in 2025, most notably the fully operational James Webb Space Telescope (JWST) and the specialized European missions CHEOPS (Characterising Exoplanet Satellite) and Gaia, have allowed for a transition from "stamp collecting" to "comparative planetology".⁴

1.2 The Statistical Landscape of 2025

The demographic data emerging from 2025 continues to reinforce the ubiquity of planets, yet it also highlights the diversity that exists beyond our solar system's template. The majority of discoveries remain in the "super-Earth" to "sub-Neptune" size range—planets between the size of Earth and Neptune that have no analogue in our own system. This "radius valley," a scarcity of planets with radii between 1.5 and 2.0 times that of Earth, continues to be a focal point of research, separating rocky worlds that have lost their primordial atmospheres from those that have retained thick envelopes of hydrogen and helium.⁵

Table 1 illustrates the breakdown of the planetary census as it stood at the end of 2025, highlighting the dominance of the TESS mission in identifying candidates and the growing contribution of direct astrometric detection via Gaia.

The year 2025 was not merely a celebration of past achievements but a crucible for current theories. Simplistic models of habitability were dismantled by complex new data. The optimism surrounding "ocean worlds" was tempered by geophysical realities, and the search for biosignatures faced the harsh noise of stellar activity. This report details these scientific journeys, organized by the physical regimes of the planets discovered: the rocky habitable candidates, the enigmatic sub-Neptunes, and the dynamic gas giants.

2. The Search for Earth 2.0: The Solar Neighborhood

The identifying of rocky, temperate worlds orbiting stars within our local galactic neighborhood remains the "Holy Grail" of exoplanet science. Proximity is the most valuable currency in astronomy; the closer a star is, the brighter it appears, allowing for higher signal-to-noise ratios in spectroscopic studies. 2025 delivered a significant victory in this arena with the discovery of a new neighbor.

2.1 Gliese 251 c: A Super-Earth Next Door

In October 2025, a team of astronomers led by researchers at the University of California, Irvine, and utilizing the Habitable-Zone Planet Finder (HPF) spectrograph, announced the discovery of Gliese 251 c (GJ 251 c).⁹ This discovery is momentous not because the planet is unique in its physical parameters, but because of its location: the Gliese 251 system lies just 18 light-years from Earth, effectively in our backyard.⁹

2.1.1 Physical Parameters and Orbit

GJ 251 c orbits a red dwarf (M-dwarf) star, the most common type of star in the Milky Way. The planet is classified as a "super-Earth," with a mass approximately 3.88 times that of Earth.¹¹ Unlike the blistering orbits of hot Jupiters, GJ 251 c completes one revolution every 53.6 days, orbiting at a distance of 0.196 Astronomical Units (AU) from its host star.¹³

While an orbit of 0.2 AU would place a planet well inside the orbit of Mercury in our solar system, the low luminosity of the M-dwarf host means that GJ 251 c resides firmly within the "habitable zone"—the region where the equilibrium temperature of the planet could allow for the existence of liquid water on the surface, provided the planet possesses a suitable atmosphere.¹⁴

2.1.2 The Method: Radial Velocity and Long Baselines

The detection of GJ 251 c highlights the enduring value of the radial velocity (RV) method. Unlike the transit method, which relies on the serendipitous alignment of a planet passing in front of its star, the RV method detects the gravitational tug of the planet on the star. As the planet orbits, it causes the star to "wobble," inducing a Doppler shift in the star's light—shifting toward the blue as it moves toward Earth and toward the red as it moves away.¹⁵

Finding a planet like GJ 251 c required extreme patience. The signal was extracted from over 20 years of archival data combined with high-precision observations from the HPF instrument on the Hobby-Eberly Telescope.¹⁴ The HPF is specifically designed to operate in the near-infrared, the wavelength regime where cool M-dwarf stars emit most of their light, allowing for the detection of subtle signals that would be invisible to optical spectrographs.¹⁰

2.1.3 Implications for Future Observatories

The most exciting aspect of GJ 251 c is its potential for direct characterization. Because the planet does not appear to transit its star from Earth's vantage point, transmission spectroscopy (measuring starlight filtering through an atmosphere) is not possible. However, its proximity makes it a prime candidate for direct imaging by the next generation of ground-based observatories, specifically the Thirty Meter Telescope (TMT) currently in development.⁹

Direct imaging requires separating the faint light of the planet from the overwhelming glare of the host star. The angular separation of GJ 251 c from its star, combined with its nearness to Earth, places it within the theoretical resolution limits of the TMT's adaptive optics systems. If successful, this would allow astronomers to analyze the light reflected off the planet's surface or atmosphere, searching for spectral fingerprints of water, oxygen, or methane.⁹

2.2 Re-evaluating the Habitable Zone

The discovery of GJ 251 c coincided with a theoretical expansion of what constitutes the "habitable zone" (HZ). For decades, the HZ was defined by a "conservative" strip where an Earth-like atmosphere could sustain liquid water. However, research published in 2025 by Amri Wandel and colleagues has pushed these boundaries.¹⁷

2.2.1 Tidal Locking and Nightside Habitability

Planets orbiting close to M-dwarf stars, like GJ 251 c and the TRAPPIST-1 planets, are subject to strong tidal forces that likely lock their rotation to their orbit. This results in "synchronous rotation," where one side of the planet faces the star eternally (permanent day) and the other faces the void (permanent night).

The 2025 study suggests that the "nightside" of these tidally locked worlds could maintain liquid water significantly closer to the star than the inner edge of the conservative habitable zone. If a planet has a thick enough atmosphere to redistribute heat, or if subglacial melting occurs, the habitable real estate around M-dwarfs could be much larger than previously calculated.¹⁷ This expands the list of potential targets for astrobiological surveys, effectively "rescuing" planets that were previously thought to be too hot.

3. The Atmospheric Revolution: JWST and the Sub-Neptune Puzzle

If the discovery of GJ 251 c represents the triumph of classical detection methods, the atmospheric studies of 2025 represent the frontier of astrophysics. The James Webb Space Telescope (JWST) spent the year staring deep into the atmospheres of "sub-Neptunes" and "super-Earths," yielding results that were often contradictory and counter-intuitive.

3.1 TOI-561 b: The "Wet Lava Ball"

One of the most surprising results of 2025 came from the ultra-hot super-Earth TOI-561 b. This planet orbits an ancient, metal-poor star and has a surface temperature estimated at over 1,800 degrees Celsius (3,200 degrees Fahrenheit).¹⁸ Conventional wisdom in planetary science suggested that a small rocky world subjected to such intense irradiation should be a bare rock, its atmosphere stripped away by the stellar wind and high-energy photons long ago.

3.1.1 Evidence for a Heavy Atmosphere

Contrary to these expectations, observations using JWST's Near-Infrared Spectrograph (NIRSpec) detected a thermal emission spectrum that did not match that of a bare rock. If TOI-561 b were airless, its dayside should be intensely bright in the infrared, radiating all the heat absorbed from the star. Instead, the data showed a cooler dayside, implying that heat was being efficiently redistributed to the nightside.¹⁹

The best fit for the data is a thick, volatile-rich atmosphere, likely composed of water vapor (H2O) and carbon dioxide (CO2). Researchers have colloquially termed this state a "wet lava ball"—a planet with a global magma ocean overlaid by a crushing, steamy atmosphere.²¹

3.1.2 The Magma-Atmosphere Cycle

How can a planet retain an atmosphere in such a hostile environment? The 2025 findings suggest a dynamic equilibrium mechanism. As atmospheric gases escape into space due to photoevaporation, they are replenished by outgassing from the magma ocean below. The planet is essentially "breathing," with the molten interior acting as a vast reservoir of volatiles that constantly refreshes the atmosphere.²⁰ This discovery challenges the "cosmic shoreline" hypothesis—the empirical dividing line between planets that keep atmospheres and those that do not—by proving that even highly irradiated super-Earths can maintain heavy envelopes if their internal geology is active enough.

3.2 The Hycean World Controversy: K2-18b

While TOI-561 b offered a new model for hot worlds, the debate over temperate "Hycean" worlds—planets with liquid water oceans and hydrogen atmospheres—reached a fever pitch in 2025. The center of this storm was K2-18b, a sub-Neptune located 124 light-years away.

3.2.1 The Rise of the Biosignature Claim

In 2023, early JWST observations hinted at the presence of dimethyl sulfide (DMS) in K2-18b's atmosphere. On Earth, DMS is produced almost exclusively by marine phytoplankton, making it a "smoking gun" biosignature. In April 2025, a team led by Nikku Madhusudhan published a study using JWST's Mid-Infrared Instrument (MIRI), claiming a detection of DMS with 3-sigma confidence.²⁴ This seemingly confirmed K2-18b as a Hycean world teeming with life.

3.2.2 The Collapse of the Evidence

However, the scientific method relies on reproducibility and scrutiny. By late 2025, the consensus on K2-18b had shifted dramatically due to two major developments:

1. Instrumental Systematics (Red Noise):

A NASA-led team, including Renyu Hu, re-analyzed the MIRI data and found that the DMS signal was indistinguishable from "red noise"—systematic errors inherent to the instrument that create ghost signals. When different data reduction techniques were applied, the DMS features disappeared or could be equally well explained by abiotic molecules like ethane or methane.26 The statistical significance of the biosignature evaporated under independent review.

2. The Geophysical Rebuttal:

A theoretical study led by ETH Zurich (Werlen, Dorn, et al.) published in September 2025 struck a fatal blow to the "ocean" aspect of the Hycean model. Their modeling of the chemical interactions between a hydrogen atmosphere and a planetary interior showed that liquid water is unstable in such conditions. Over millions of years, the water would dissolve into the magma ocean or react to form other species, leaving the surface dry.28

The conclusion of 2025 is that K2-18b is likely a "magma world" with a thin, water-depleted atmosphere, rather than a life-sustaining ocean world.²⁸ This episode serves as a powerful reminder of the dangers of over-interpreting low-resolution spectra and the necessity of linking atmospheric observations with geophysical models.

4. The Limits of Detection: TRAPPIST-1e and Stellar Noise

The seven Earth-sized planets of the TRAPPIST-1 system are the most scrutinized worlds in the galaxy. In 2025, the focus zeroed in on TRAPPIST-1e, a planet in the habitable zone that many hoped would be the first true "Earth twin."

4.1 The Promise and the Noise

Early observations had teased the possibility of a secondary atmosphere containing methane and carbon dioxide. However, a comprehensive study by Glidden et al. (2025) utilizing JWST's NIRSpec/PRISM revealed the immense difficulty of characterizing this world. The study concluded that the transmission spectra were dominated not by the planet, but by stellar contamination.²⁹

4.1.1 Starspots and Faculae

TRAPPIST-1 is an active M-dwarf star, covered in cool, dark sunspots and hot, bright faculae. When a planet transits the star, it may pass over these features. If the planet blocks a bright facula, the transmission spectrum can be distorted in a way that mimics the absorption signal of water or methane. This "stellar heterogeneity" creates a noise floor that is currently higher than the signal of a thin, Earth-like atmosphere.²⁹

4.1.2 Defining the Unknown

The 2025 analysis was able to rule out certain scenarios: TRAPPIST-1e does not have a thick, hydrogen-rich atmosphere (which would be uninhabitable), nor does it have a dense, cloud-free carbon dioxide atmosphere like a massive Venus. However, the data cannot yet distinguish between a planet with a nitrogen-dominated atmosphere (like Earth's) and a bare rock.³¹ The "ambiguity" of TRAPPIST-1e highlights a critical technological gap: to find life on M-dwarf planets, we must first master the physics of the stars they orbit.

5. Gas Giants and Dynamic Architectures

While the search for life faced hurdles, the study of gas giants flourished in 2025, offering spectacular insights into planetary dynamics and evolution.

5.1 WASP-107b: The "Super-Puff" Tail

In December 2025, researchers using JWST's NIRISS instrument imaged the atmosphere of WASP-107b, a "super-puff" planet with the mass of Neptune but the radius of Jupiter.³³ The observations revealed a massive tail of escaping helium gas. Uniquely, this tail was not just trailing the planet; it was observed preceding the planet in its orbit, stretching ten planetary radii ahead.³⁴

This "leading tail" provides a real-time view of atmospheric escape driven by stellar irradiation. It confirms that "super-puffs" are transient objects, actively losing mass as they migrate inward. This process, known as photoevaporation, is a key mechanism in shaping the planetary population, potentially stripping gas giants down to their rocky cores to create the super-Earths we see in abundance.³⁴

5.2 HIP 67522 b: The Planet-Induced Flare

In July 2025, the CHEOPS mission uncovered a violent interaction in the HIP 67522 system. HIP 67522 b, a hot Jupiter orbiting a young star, was found to be magnetically connected to its host. The planet's magnetic field acts as a conductor, triggering massive flares on the star's surface.³⁷

These flares, 100 times more energetic than typical solar flares, are directed back at the planet, stripping away its atmosphere. This discovery of Star-Planet Magnetic Interaction (SPMI) proves that planets are not passive bodies; they can actively influence the behavior of their stars, sometimes triggering the very events that lead to their own destruction.³⁸

5.3 Gaia-4b: The Astrometric Giant

The European Space Agency's Gaia mission, famous for mapping the galaxy's stars, made a major contribution to exoplanet science in 2025 with the confirmation of Gaia-4b. This "Super-Jupiter" (12 times the mass of Jupiter) was detected via astrometry—measuring the tiny, corkscrew motion of the star across the sky caused by the planet's gravity.⁸

Gaia-4b orbits a low-mass star on a wide, 570-day orbit.⁴¹ This system challenges planetary formation models, specifically core accretion, which posits that small stars should not have enough material in their protoplanetary disks to form such massive giants. Gaia-4b suggests that gravitational instability (where a disk collapses directly into a planet) may play a larger role in planet formation than previously thought.⁴²

6. Strategic Shifts: Policy and the Future of Astrobiology

The scientific findings of 2025 have directly influenced the strategic planning of major space agencies. The realization that M-dwarf planets (like TRAPPIST-1e) are plagued by stellar noise, and that sub-Neptunes (like K2-18b) may be dry magma worlds, has shifted the focus back toward Sun-like stars and direct imaging.

6.1 NASA’s Habitable Worlds Observatory (HWO)

In response to the limitations of current transit spectroscopy, NASA accelerated the development of the Habitable Worlds Observatory (HWO) in 2025. This future flagship mission is designed to directly image Earth-like planets around Sun-like stars, bypassing the noise issues of M-dwarfs.

In 2025, NASA selected specific technology proposals from industry giants like Northrop Grumman, Lockheed Martin, and L3Harris to develop the ultra-stable optical systems required for the HWO.⁴³ The mission will require coronagraphs thousands of times more capable than any currently in existence, capable of blocking starlight to reveal the faint "pale blue dot" alongside it.

6.2 The Search for Life on Mars

While exoplanets offer statistical breadth, our own solar system offers accessibility. A National Academies report published in 2025 designated the "Search for Life" as the number one scientific priority for the first human mission to Mars.⁴⁴

This recommendation was bolstered by findings from the Perseverance rover, which in 2025 identified "leopard spot" chemical signatures in the Jezero crater—features that on Earth are associated with microbial life.⁴⁶ This convergence of robotic results and human exploration policy suggests that the first definitive detection of extraterrestrial life may come not from a telescope pointing at a distant star, but from a microscope on the Red Planet.

6.3 The PLATO Mission

Looking ahead to 2026 and 2027, the European Space Agency's PLATO (PLAnetary Transits and Oscillations of stars) mission completed key integration milestones in 2025.⁴⁸ PLATO is designed to detect Earth-sized planets in the habitable zones of bright, Sun-like stars. Unlike TESS, which focuses on short-period planets, PLATO will stare at fields of stars for up to two years, allowing it to find true Earth analogues. These targets will be the primary hunting ground for the Habitable Worlds Observatory in the 2040s.⁴⁹

7. Conclusion: A Year of Calibration

The year 2025 will be remembered as a year of "calibration" in exoplanetary science. The initial euphoria of the JWST era has given way to a more nuanced, rigorous appreciation of the complexities of other worlds.

We learned that:

1. Proximity matters: The discovery of GJ 251 c proves that we have not yet found all our neighbors, and that high-precision radial velocity remains a potent tool.

2. Chemistry is complex: The K2-18b saga taught us that not every spectral dip is a biosignature, and that the interior physics of a planet can negate the habitability suggested by its atmosphere.

3. Stars are noisy: The TRAPPIST-1e results forced a confrontation with the limits of transmission spectroscopy, pushing the field toward direct imaging and Sun-like hosts.

4. Dynamics are violent: From the escaping tail of WASP-107b to the self-inflicted flares of HIP 67522 b, we see that planetary systems are dynamic, evolving environments, often hostile to the very atmospheres we seek to study.

As we look toward the launch of PLATO and the development of the Habitable Worlds Observatory, the lessons of 2025 provide the foundation. We are no longer just counting planets; we are learning to read them, decoding the faint whispers of light that carry the story of their formation, their climate, and—perhaps one day—their inhabitants.

Table 2: Summary of Key Exoplanetary Discoveries and Paradigms in 2025

Works cited

1. Exoplanets - NASA Science, accessed January 13, 2026, https://science.nasa.gov/exoplanets/

2. CHEOPS News Home Page, accessed January 13, 2026, https://www.ssdc.asi.it/cheops/news.php

3. The Most Exciting Exoplanet Discoveries of 2025 - RealClearScience, accessed January 13, 2026, https://www.realclearscience.com/2025/12/27/the_most_exciting_exoplanet_discoveries_of_2025_1155593.html

4. The most exciting exoplanet discoveries of 2025 - Space, accessed January 13, 2026, https://www.space.com/astronomy/exoplanets/the-most-exciting-exoplanet-discoveries-of-2025

5. [2509.03549] Revisiting the Radius Valley Across Stellar Types: A Transit-Only Analysis of M, K, G, and F Stars with Updated NASA Exoplanet Archive Data - arXiv, accessed January 13, 2026, https://arxiv.org/abs/2509.03549

6. 2025 Exoplanet Archive News, accessed January 13, 2026, https://exoplanetarchive.ipac.caltech.edu/docs/2025news.html

7. NASA Exoplanet Archive, accessed January 13, 2026, https://exoplanetarchive.ipac.caltech.edu/

8. The odd new worlds we've discovered in 2025 | Mashable, accessed January 13, 2026, https://mashable.com/article/planets-exoplanets-discovery-2025

9. UC Irvine astronomers discover nearby exoplanet in habitable zone, accessed January 13, 2026, https://news.uci.edu/2025/10/23/uc-irvine-astronomers-discover-nearby-exoplanet-in-habitable-zone/

10. HPF Discovers a Potentially Earth-like Exoplanet That Could Be Imaged by Next-Generation Telescopes | The Habitable Zone Planet Finder, accessed January 13, 2026, https://hpf.psu.edu/2025/10/23/gj251c/

11. accessed January 13, 2026, https://science.nasa.gov/exoplanet-catalog/gj-251-c/#:~:text=GJ%20251%20c%20is%20a,discovery%20was%20announced%20in%202025.

12. Exoplanet Gliese 251 c - Stellar Catalog, accessed January 13, 2026, https://www.stellarcatalog.com/exoplanet.php?planetID=100128

13. GJ 251 c - NASA Science, accessed January 13, 2026, https://science.nasa.gov/exoplanet-catalog/gj-251-c/

14. Super-Earth less than 20 light-years away is an exciting lead in the search for life | Space, accessed January 13, 2026, https://www.space.com/astronomy/exoplanets/super-earth-less-than-20-light-years-away-is-an-exciting-lead-in-the-search-for-life

15. This New Super Earth May Have Liquid Water And It's In Our Neighbourhood, accessed January 13, 2026, https://www.universetoday.com/articles/this-new-super-earth-may-have-liquid-water-and-its-in-our-neighbourhood

16. Scientists Just Found a Super-Earth Exoplanet Only 18 Light-Years Away - Science Alert, accessed January 13, 2026, https://www.sciencealert.com/scientists-just-found-a-super-earth-exoplanet-only-18-light-years-away

17. Exoplanets Beyond The Conservative Habitable Zone: I. Habitability - Astrobiology, accessed January 13, 2026, https://astrobiology.com/2025/10/exoplanets-beyond-the-conservative-habitable-zone-i-habitability.html

18. Scientists Find the Strongest Evidence Yet of an Atmosphere on a Molten Rocky Exoplanet, accessed January 13, 2026, https://www.universetoday.com/articles/scientists-find-the-strongest-evidence-yet-of-an-atmosphere-on-a-molten-rocky-exoplanet

19. NASA's Webb Detects Thick Atmosphere Around Broiling Lava World, accessed January 13, 2026, https://science.nasa.gov/missions/webb/nasas-webb-detects-thick-atmosphere-around-broiling-lava-world/

20. Ultra-hot lava world has thick atmosphere, upending expectations | Carnegie Science, accessed January 13, 2026, https://carnegiescience.edu/ultra-hot-lava-world-has-thick-atmosphere-upending-expectations

21. James Webb Space Telescope finds strongest evidence yet for atmosphere around rocky exoplanet: 'It's really like a wet lava ball', accessed January 13, 2026, https://www.space.com/astronomy/exoplanets/james-webb-space-telescope-finds-strongest-evidence-yet-for-atmosphere-around-rocky-exoplanet-its-really-like-a-wet-lava-ball

22. "Wet lava ball" exoplanet may have an atmosphere, new evidence shows - CBS News, accessed January 13, 2026, https://www.cbsnews.com/news/exoplanet-super-earth-toi-561b-nasa-james-webb-space-telescope/

23. James Webb Space Telescope detects thick atmosphere around broiling lava world | News | University of Groningen - RUG, accessed January 13, 2026, https://www.rug.nl/fse/news/matter-and-space/james-webb-space-telescope-detects-thick-atmosphere-around-broiling-lava-world?lang=en

24. Signs of life on K2-18 b revisited in new NASA study - Astronomy Magazine, accessed January 13, 2026, https://www.astronomy.com/science/new-study-revisits-signs-of-life-on-k2-18-b/

25. Strongest hints yet of biological activity outside the solar system - EurekAlert!, accessed January 13, 2026, https://www.eurekalert.org/news-releases/1080558

26. K2-18b Does Not Meet The Standards Of Evidence For Life - Astrobiology, accessed January 13, 2026, https://astrobiology.com/2025/08/k2-18b-does-not-meet-the-standards-of-evidence-for-life.html

27. A Comprehensive Reanalysis of K2-18 b's JWST NIRISS+NIRSpec Transmission Spectrum, accessed January 13, 2026, https://arxiv.org/html/2501.18477v2

28. Exoplanets are not water worlds | ETH Zurich, accessed January 13, 2026, https://ethz.ch/en/news-and-events/eth-news/news/2025/09/exoplanets-are-not-water-worlds.html

29. Selections from 2025: JWST Searches for an Atmosphere on TRAPPIST-1e - AAS Nova, accessed January 13, 2026, https://aasnova.org/2025/12/26/selections-from-2025-jwst-searches-for-an-atmosphere-on-trappist-1e/

30. Study finds exoplanet TRAPPIST-1e is unlikely to have a Venus- or Mars-like atmosphere, accessed January 13, 2026, https://news.mit.edu/2025/study-finds-habitable-zone-planet-unlikely-have-venus-or-mars-like-atmosphere-0908

31. TRAPPIST‑1 e Revealed: Peering Inside an Exoplanet's Atmosphere - SETI Institute, accessed January 13, 2026, https://www.seti.org/news/trappist-1-e-revealed-peering-inside-an-exoplanet-s-atmosphere/

32. [2509.05407] JWST-TST DREAMS: Secondary Atmosphere Constraints for the Habitable Zone Planet TRAPPIST-1 e - arXiv, accessed January 13, 2026, https://arxiv.org/abs/2509.05407

33. Exoplanet Caught Shedding Its Atmosphere in Real Time, accessed January 13, 2026, https://exoplanetes.umontreal.ca/en/exoplanet-caught-shedding-its-atmosphere-in-real-time/

34. Webb Telescope captures exoplanet dramatically shedding its atmosphere in real time, accessed January 13, 2026, https://news.uchicago.edu/story/webb-telescope-captures-exoplanet-dramatically-shedding-its-atmosphere-real-time

35. A 'super-puff' exoplanet is losing its atmosphere, and the James Webb Space Telescope had a look, accessed January 13, 2026, https://www.space.com/astronomy/james-webb-space-telescope/giant-helium-cloud-caught-escaping-from-puffy-exoplanet-by-jwst

36. Helium escape mapped from superpuff exoplanet WASP 107b by JWST - Space Daily, accessed January 13, 2026, https://www.spacedaily.com/reports/Helium_escape_mapped_from_superpuff_exoplanet_WASP_107b_by_JWST_999.html

37. CHEOPS discovers exoplanet triggering explosive flares on host star - NASASpaceFlight.com, accessed January 13, 2026, https://www.nasaspaceflight.com/2025/07/cheops-hip-67522/

38. Close-in planet induces flares on its host star - arXiv, accessed January 13, 2026, https://arxiv.org/html/2507.00791v2

39. Clingy planets can trigger own doom, suspect Cheops and TESS - European Space Agency, accessed January 13, 2026, https://www.esa.int/Science_Exploration/Space_Science/Cheops/Clingy_planets_can_trigger_own_doom_suspect_Cheops_and_TESS

40. High-Precision NEID Spectrograph Helps Confirm First Gaia Astrometric Planet Discovery, accessed January 13, 2026, https://noirlab.edu/public/news/noirlab2505/

41. First Gaia astrometric planet discovery confirmed | Carnegie Science, accessed January 13, 2026, https://carnegiescience.edu/news/first-gaia-astrometric-planet-discovery-confirmed

42. ESA - Wobbling stars reveal hidden companions in Gaia data - European Space Agency, accessed January 13, 2026, https://www.esa.int/Science_Exploration/Space_Science/Gaia/Wobbling_stars_reveal_hidden_companions_in_Gaia_data

43. NASA Selects Tech Proposals to Advance Search-for-Life Mission, accessed January 13, 2026, https://www.nasa.gov/news-release/nasa-selects-tech-proposals-to-advance-search-for-life-mission/

44. Search for life should be top science priority for first human landing on Mars report says, accessed January 13, 2026, https://www.marsdaily.com/reports/Search_for_life_should_be_top_science_priority_for_first_human_landing_on_Mars_report_says_999.html

45. Search for Life Should Be Top Science Priority for First Human Landing on Mars, Says New Report, accessed January 13, 2026, https://www.nationalacademies.org/news/search-for-life-should-be-top-science-priority-for-first-human-landing-on-mars-says-new-report

46. 8 astronomy discoveries that wowed us in 2025 - Space, accessed January 13, 2026, https://www.space.com/astronomy/the-top-astronomical-discoveries-of-2025

47. The Mars Report: September 2025 — Special Edition - NASA Science, accessed January 13, 2026, https://science.nasa.gov/mars/the-mars-report/2025-september-special-edition/

48. ESAs PLATO space telescope completed and ready for final tests, accessed January 13, 2026, https://www.dlr.de/en/latest/news/2025/esa-plato-space-telescope-completed-and-ready-for-final-tests

49. PLATO | CNES, accessed January 13, 2026, https://cnes.fr/en/projects/plato