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Imagine a cosmic eye that sees in the dark. The James Webb Space Telescope is a giant mirror in space that catches light invisible to our eyes, just as a cat sees in the dark. It looks back in time to see how the first stars and galaxies were born, like flipping through an old photo album of the Universe.

History

Launched on December 25, 2021, after decades of planning. Named after James Webb, NASA administrator during the Apollo program. Developed by NASA in collaboration with the European and Canadian space agencies.

How it works

A huge segmented mirror collects infrared light and focuses it onto detectors. Just as a sunflower turns toward the sun, the thermal shield always blocks sunlight and heat from the Sun and Earth, cooling the instruments to cryogenic temperatures for maximum sensitivity.

💡 Webb's mirror is made of gold and is the size of a tennis court. Its sunshield is as big as a bus stop, and it always keeps the telescope in the shade, like a beach umbrella.
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arXiv:2606.05277v1 · 2026-06-03

Tiny Sparks That Ignited the Universe

A natural gravitational lens—the Abell 2744 cluster—boosted JWST's ultra-deep observations and allowed the selection of a population of compact galaxies with an equivalent width of [OIII]+Hβ >740 Å. NIRSpec spectroscopy confirmed: their metallicity is 10–100 times lower than solar, dust is almost ab
arXiv:2606.05323v1 · 2026-06-03

Ultraviolet Trap: How TRAPPIST-1 Star Fakes Signs of Life

TRAPPIST-1 e is a rocky planet in the habitable zone of a red dwarf, one of astrobiologists' prime targets. But decoding its atmosphere requires a precise ultraviolet 'autograph' of the star. Simulations showed: different UV spectra dramatically alter the chemical portrait, producing deceptive pairs
arXiv:2606.05451v1 · 2026-06-03

Quasi-stars: The Furnaces Where Supermassive Black Holes Are Born

The James Webb Space Telescope has spotted mysterious "Little Red Dots" in the early universe—compact objects that don't fit standard models. A new study suggests they may be quasi-stars: black holes shrouded in a dense gas cocoon that thermalizes radiation like a giant furnace. Calculations using t
arXiv:2606.06575v1 · 2026-06-04

Roots of the Cosmic Banyan: How Black Holes Feed

New data from the JWST telescope on galaxy NGC 4696 in the Centaurus cluster have for the first time traced the kinematic connection between large-scale filaments and a compact circumnuclear disk with a radius of about 120 parsecs. The S-shaped structure, familiar from Hubble images, turned out to b
arXiv:2606.06620v1 · 2026-06-04

Cosmic Tan: How Stellar Flares Repaint Water Worlds

Atmospheres of many sub-Neptunes are shrouded in dense organic hazes that hide their true composition. In lab experiments, such hazes were recreated from water vapor, methane, and carbon dioxide, then irradiated with ultraviolet light, mimicking flares from red dwarfs. It turned out that after irrad
arXiv:2606.06691v1 · 2026-06-04

Cosmic Prospector: Sifting Stars in Search of Life

Where to look for intelligent brothers? A new parametric filter of seven criteria rejects stars unable to support complex life. From Gaia DR3's 1.74 million stars, it eliminated 55.4%, retaining 777,835 priority targets — mostly G and K dwarfs. Key rejection factors: low metallicity and youth. Notab
arXiv:2606.06692v2 · 2026-06-04

The Rapids of a Black Hole: The Birth and Death of Blanets

In the turbulent disks of active galactic nuclei, blanets form—giant planets of incredible density. Drifting toward the central black hole, they are torn apart by tidal forces, generating brief but dazzling flares in optical and ultraviolet light. Their density allows them to approach the horizon of
arXiv:2606.06884v1 · 2026-06-05

The Cosmic Hump: How a New Spectrum Creates Massive Galaxies at the Dawn of Time

Observations by the James Webb Space Telescope have shown that in the early Universe, there are tens to hundreds of times more massive galaxies than standard cosmology allowed. A new model offers a paradoxically simple solution: a tiny 'hump'—a local enhancement—in the spectrum of primordial perturb
arXiv:2606.07357v1 · 2026-06-05

The Cosmic Forge: Why GJ 3929 b Lost Its Air

Ultra-precise photometry of four secondary eclipses of the planet in the red dwarf system GJ 3929 yielded a depth of 118±22 ppm, corresponding to a dayside temperature of about 640 K. Modeling showed that a dense carbon dioxide envelope like Venus's cannot be held, though traces of gases might remai
arXiv:2606.07511v1 · 2026-06-05

Cosmic Latte: Why X-rays Are Three Times Brighter Than Hydrogen

Why does the ratio of X-ray brightness to H-alpha line emission in diverse systems—from galactic winds to jellyfish—stubbornly hover around three? Astonishingly, H-alpha arises from cold gas (10,000 K), while X-rays come from plasma heated to millions of degrees. Three-dimensional simulations have c
arXiv:2606.07741v1 · 2026-06-05

Heavy water ice found in planet-forming disk

The Webb telescope directly observed heavy water ice for the first time in a planetary disk—the birthplace of planets. There's unexpectedly a lot of it, pointing to a turbulent history of the ice that might explain the origin of Earth's oceans.
arXiv:2606.10888 · 2026-06-09

Mysterious Trace on Titan's Surface

Titan's dense haze long concealed its surface. But in infrared light, the JWST telescope discerned a narrow dark band — a chemical fingerprint of an unknown substance. A similar, but broader, one was found on Pluto. This discovery brings us closer to unraveling the composition of distant icy worlds.
arXiv:2606.13350 · 2026-06-11

Early dark energy reconciles the different ‘thermometers’ of the Universe

Astronomers added a short-lived dark energy to the standard model, which appeared right after the Big Bang. This idea reconciled two methods of measuring cosmic expansion that previously gave different speeds—like two different thermometers. This approach strengthens the model without a major overha
arXiv:2606.19090 · 2026-06-17

A Planet's Rotation Revealed Its Fiery Secrets

Astronomers studied WASP-121 b, a gas giant always facing its star with one side. As the planet transited the star, they detected changes in light absorption: the eastern limb was hotter than the western, which destroys water and leaves carbon monoxide. This opens a method for scanning weather on su
arXiv:2606.19487 · 2026-06-17

James Webb Fishes Out an Invisible Planet from a Dusty Disk

A third giant planet has been found around Beta Pictoris—not in an image, but through chemical traces in light: methane, water, and carbon monoxide. It is 2–4 times more massive than Jupiter and sits so far out that a year there lasts over a century. Its gravity shapes the inner edge of the dusty di
arXiv:2606.23789 · 2026-06-22

Fog Passes Off Tiny Black Holes as Giants

The Webb telescope spotted red dots that look like galactic cores with enormous black holes. But a fresh analysis suggests they might be modest-sized objects wrapped in a dense gas cocoon. Just as fog makes a lantern seem like a huge red ball, the gas distorts our estimates. Inside, there may not be
arXiv:2606.30711 · 2026-06-29

Can life travel between stars on icy comets?

Data from JWST and SPHEREx on comet 3I/ATLAS revealed that natural spread of life in ice is possible if microbes periodically thaw. But intentional sending of life by another civilization is nearly impossible — the impact would be too hot. The work proposes a method to search for life on such wander
arXiv:2607.00202 · 2026-06-30

The Universe's Foundry: Kilonova Dust and the Birth of Gold

Astrophysicists have discovered that dust grains of refractory elements—tungsten and osmium—form in the ejecta of a kilonova. Their near-blackbody infrared emission perfectly matches JWST data for kilonova AT2023vfi. Simulations of cluster growth and radiative transfer confirmed the rapid formation
arXiv:2607.00433v1 · 2026-07-01

The Hourglass of an Ancient Galaxy: JWST Spots Maturity That Arrived Too Soon

Analysis of images from JWST and Hubble with NIRSpec spectroscopy has revealed details of a distant disk galaxy at z=0.92. Multi-component modeling showed that an X-shaped bulge 4.5 kpc long and a bar of about 12 kpc were already present when the Universe was only 6.2 billion years old. A total stel
arXiv:2607.00982v1 · 2026-07-01

Dim Architects of Dawn: How Invisible Galaxies Lit Up the Universe

Analysis of ultra-deep images of the Abell S1063 cluster, boosted by nature's own gravitational telescope, has for the first time peered into the population of ultra-faint galaxies at redshifts 6 to 11. It turns out that even under the most conservative suppression of star formation, these tiny obje
arXiv:2607.01129v1 · 2026-07-01

Cosmic Carving: Birth of a Bloated Neptune from a Jupiter

Astronomers discovered exoplanet TOI-2195 A b – a hot Neptune with a mass 1.5 times that of Neptune, but a radius almost as large as Jupiter's. Orbital analysis suggests a likely polar orbit. Modeling indicates the planet may have formed as a cold Jupiter, losing up to 90% of its mass during highly
arXiv:2607.01315v1 · 2026-07-01

Smoldering Giant: Methane and Haze over a Dead Star

The James Webb Space Telescope has peered into a previously unseen world: the atmosphere of the giant planet WD 1856 b, orbiting a white dwarf. The transit spectrum from 0.5 to 5.0 μm revealed hydrocarbons, including methane with a significance of 17:1 to 30:1, thick aerosols, and thermal glow from
arXiv:2607.01316v1 · 2026-07-01

Cosmic Metamorphosis: How Quasars Shed Their Dust Cocoons

A study of rare quasars with powerful outflows and anomalously weak emission lines has shown that these objects are in a transitional phase of 'blowing off' their dust cocoons. Using spectroscopy and polarimetry, outflow velocities of up to 0.16c were measured, and a predominance of tiny dust grains
arXiv:2607.01330v1 · 2026-07-01

The Conductor's Baton: How a Phase Transition Creates Axion Dark Matter

Lattice simulations showed that a first-order cosmic phase transition — like a sudden sweep of a conductor's baton — causes the axion field to switch on abruptly rather than smoothly. This gives rise to two regimes: a fast transition enhances the axion abundance due to delayed oscillations, while a
arXiv:2607.01333v1 · 2026-07-01

The Cosmic Club with Face Control: The Mystery of Quasar Broad Lines Solved

Broad emission lines are the hallmark of active galactic nuclei, but they mysteriously weaken both at low and critically high accretion rates. A new study proposes a unified mechanism: the filtering of ionizing radiation by dense inner disk structures plays the decisive role. The effective flux reac
arXiv:2607.01479v1 · 2026-07-01

Cosmic Kick: Warm Orphans Born from Stellar Death

Analytical estimates and numerical simulations show that kicks during white dwarf formation directly liberate only ~1% of known exoplanets, but in multi-planet systems they trigger dynamical instability in 40–47% of cases, leading to planet ejections. These free-floating planets are heated to up to
arXiv:2607.02653v1 · 2026-07-02

The Voice of Light: How Secret Rings Reveal Themselves in the Disk of CI Tau

Protoplanetary disks harbor complex architecture, but the narrowest rings elude direct view. By analyzing how brightness varies along the disk's tilt, scientists found a 'double peak' — a telltale signal of optically thick rings in an optically thin background. This method unveils substructures beyo
arXiv:2607.02660v1 · 2026-07-02

Cosmic Cocoons: MEOW's Infrared Hunt Reveals the Secret Growth of Black Holes

In a new study presented in the MEOW survey, astronomers used the MIRI infrared camera on the James Webb Space Telescope to search for dust-obscured active galactic nuclei from an era when the Universe was less than a billion years old. Analyzing the emission from hot dust allowed them to identify 1
arXiv:2607.02666v1 · 2026-07-02

Cosmic Debt: How a Planet's Mass Locks Civilizations Forever

Scientists from Blue Marble Space combined geophysics, atmosphere, and rocket dynamics to find the limits of chemical escape from exoplanets. A payload of 1,000 kg — like that of the Voyager probes — was used as a benchmark. It turned out that for a planet more massive than about 11.5 M⊕, the number
arXiv:2607.02691v1 · 2026-07-02

Cosmic Jazz: Three Finales of an Encounter with a Black Hole

How does a primordial black hole, a dark matter candidate, alter the fate of a planetary system? Simulations of the TOI-2796 system revealed three dramatic outcomes: planet ejection, formation of a stable triple system, and capture of the planet into an eternal journey with the black hole. The rare
arXiv:2607.03724v1 · 2026-07-04

Fragrances of Cosmic Noon: How PAHs Survive the Hell of a Double Quasar

In the era of cosmic noon, 3 billion years after the Big Bang, two supermassive black holes are drawing close in galaxy J0749+2255. The MIRI infrared spectrograph on JWST captured emission from polycyclic aromatic hydrocarbons (PAHs) — organic molecules — not only in the cores but far beyond them. T
arXiv:2607.03913v1 · 2026-07-04

Triple Black Hole Waltz: How Chaos Spawns Mergers

Astrophysicists embedded the behavior of three massive black holes directly into hydrodynamic simulations of galaxies. It turned out that even a slight tilt of the third body's orbit turns billions of years of waiting into a rapid merger. The chaotic dance of three gravitational wells not only solve
arXiv:2607.04121v1 · 2026-07-05

Quasi-interstellar objects: when the Solar System meets its own exiles

The discovery of 1I/‘Oumuamua made us wonder: could some interstellar wanderers actually be our own comets, ejected from the Oort cloud and returning millions of years later? Simulations show that such ‘quasi-interstellar objects’ are indeed possible, but they have unique characteristics: extremely
arXiv:2607.04216v1 · 2026-07-05

Stellar Nurseries in the Jet's Shadow: JWST Explores Centaurus A

Centaurus A is the nearest radio galaxy to us, where an active supermassive black hole lives at its center, shooting out a powerful jet, while a warped dusty disk whirls around it. For a long time, it remained a mystery whether stars could be born under such extreme conditions. New observations with
arXiv:2607.04942v1 · 2026-07-06

The Icy Moons' Double Breath: JWST Unravels the Mystery of Uranus's Carbon Dioxide

Spectrograph NIRSpec aboard the JWST telescope has discerned a complex mosaic of carbon dioxide and carbon monoxide bands on Ariel, Umbriel, Titania, and Oberon. Comparison with laboratory ices at cryogenic temperatures revealed signatures of crystalline CO₂, clathrates, and carbonates. The observed
arXiv:2607.05600v2 · 2026-07-06

Cosmic Flash: Why Advanced Civilizations Vanish from the Ether

A model based on exponential technological growth shows: the faster a civilization develops, the shorter the period during which it emits technosignatures we can detect. At rates comparable to Earth's after the emergence of AI, this window could be less than twenty years. Traditional narrowband sear
arXiv:2607.07413 · 2026-07-08