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A supernova is a grand fireworks display, when a star explodes and momentarily shines brighter than an entire galaxy. It's like a balloon that's been inflated for millions of years until it pops.

History

Supernovae were first observed by Chinese astronomers as early as 185 AD. In the 20th century, Fritz Zwicky defined them as a separate class and predicted that they leave behind neutron stars.

How it works

In a massive star, nuclear fusion creates iron. But iron does not burn, and the core stops pushing outward. Gravity crushes the core into a neutron star or black hole, while the outer layers rebound and are flung into space.

💡 The most powerful supernova explosion was seen back in 1006 – and it was as bright as day at night!
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Fritz Zwicky
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Chandrasekhar limitFermi accelerationlaw of conservation of momentum

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arXiv:2605.21593 · 2026-05-20

How a Black Hole’s Magnetic Tilt Creates Matter

It turns out that the tilt of the magnetic field around a spinning black hole acts as a power regulator in a cosmic factory: the more precise the tilt, the more matter is born from emptiness. This explains where the energy for the brightest explosions in the universe — gamma-ray bursts — comes from.
arXiv:2605.21910 · 2026-05-21

Is Dark Energy Changing? A Fresh Look

A new method allowed a direct measurement of dark energy's strength and found: it's weaker than expected, meaning it might change over time.
arXiv:2605.27230 · 2026-05-26

The Universe Doesn't Remember Its Youth: The Echo of Quantum Gravity Can't Be Caught

Cosmologists searched for the imprint of the tumultuous birth of the universe in galaxy distance data and the afterglow of the Big Bang. But all measurements fit perfectly into the standard model, with no 'memory'. If a trace exists, it's too faint for current instruments.
arXiv:2606.00227 · 2026-05-29

A Polygraph for Flashes: How the Pincus–Lyapunov Diagram Uncovers FRBs

To unravel the nature of fast radio bursts (FRBs), astrophysicists applied methods from nonlinear dynamics and constructed the Pincus–Lyapunov diagram, comparing them with pulsar glitches, solar flares, and earthquakes. It turned out: repeating FRBs form a compact cluster on the border between stoch
arXiv:2606.01855v1 · 2026-06-01

Light Leaks into Darkness: How Photons Become Dark Matter

Two key methods for measuring the expansion rate of the Universe — the cosmic microwave background and supernovae — yield values differing by 5 sigma. A hybrid model adds to the cosmological redshift a contribution from quantum conversion of photons into hidden mass. Analysis of the Pantheon+SH0ES c
arXiv:2606.02097v1 · 2026-06-01

Fading Black Hole Flares: The Key Is the Star's Rapid Spin

Some repeating partial tidal disruption events show flares that fade from one to the next—a phenomenon that contradicted old models. Hydrodynamic simulations reveal that the culprit is the rapid initial prograde spin of a star captured via the Hills mechanism: the tidal torque is inefficient, and ma
arXiv:2606.02692v1 · 2026-06-01

Smoldering Ember in a Star’s Heart: Two Apocalypse Scenarios

These objects are one of the biggest mysteries and a possible key to dark matter. New modeling has revealed a rare but spectacular scenario with two outcomes for capture by a binary system. Without an accretion disk, the star fades unnoticed; with a disk, it is torn apart by relativistic jets in min
arXiv:2606.02700v1 · 2026-06-01

Ghost Wind of the Cosmic Dawn: How Lyman-alpha Destroys Stellar Cradles

The first two-dimensional radiation-hydrodynamic simulations prove that the radiation pressure in the Lyman-alpha (Lyα) line can exceed the direct stellar light force by up to 16 times and serve as the main feedback mechanism even before the explosion of supernovae in environments poor in dust. This
arXiv:2606.02711v1 · 2026-06-01

Milky Way passes the baton: seamless transition of cosmic rays

Precision data from DAMPE, LHAASO, and IceTop for protons, helium, and iron (40 GeV – 500 PeV) are well described by the sum of three components: a low-energy galactic one with a curved spectrum, a high-energy galactic one that creates the PeV knee, and an extragalactic one that dominates above ~100
arXiv:2606.02748v1 · 2026-06-01

Cosmic Detective: Two Independent Clues Against the Main Cosmological Debate

The Hubble constant — the expansion rate of the universe — has become a bone of contention: data from the cosmic microwave background and the distance ladder diverge by 6 sigma. Astrophysicists have proposed a new arbitration by cross-breeding 142 gravitational-wave events from the GWTC-4 catalog wi
arXiv:2606.03634v1 · 2026-06-02

Dance of Vortices in the Magnetic Heart of a Pulsar

Why do pulsars—rapidly spinning neutron stars—fall silent for tens of periods, then emit modulated pulses one after another? New three-dimensional modeling unveils the dance of non-axisymmetric plasma vortices: the diocotron instability makes charges break into a dance across magnetic field lines, r
arXiv:2606.03984v1 · 2026-06-02

Levitating Graphite Web Captures the Moon's Embrace

In Southampton, the thinnest graphite flake has been turned into an ultrasoft gravitational antenna. Levitating above magnets, it shifts by nanometers under tidal forces, and a laser interferometer converts this into a precise signal. The instrument distinguishes lunar and solar contributions, achie
arXiv:2606.14738v1 · 2026-06-02

Gaia Sausage — A Palimpsest: Four Ancient Mergers that Rewrote the Galaxy's Heart

Like a restorer examining an ancient manuscript under different lights, astronomers used DESI spectroscopy and the GS3 Hunter algorithm to peer beneath the surface of the Gaia Sausage. They found not a monolith, but a palimpsest: four substructures aged 7 to 12 billion years, differing in chemical c
arXiv:2606.04462v1 · 2026-06-03

Dark mountains of neutron stars: gravitational waves probe dark matter

Researchers combined a two-fluid model of neutron stars with fermionic dark matter and results from the search for continuous gravitational waves by the LIGO detectors. An anisotropic distribution of dark matter can create 'dark mountains' — quadrupole deformations that amplify emission. Comparison
arXiv:2606.05082v1 · 2026-06-03

Magnetic Forge: Plasma Pulsations Give Birth to Record Energies

In astrophysical plasma with high beta parameter — from planetary magnetospheres to accretion disks around black holes — particles with non-thermal energies are often detected. New kinetic simulations have shown for the first time: they are produced by magnetic pumping — rhythmic cycles of compressi
arXiv:2606.05286v1 · 2026-06-03

The Cosmic Metronome Falls Out of Rhythm: Dark Energy Rewrites Hubble's Symphony

The DESI instrument, mapping millions of galaxies, has picked up signs of dark energy evolution. This discovery rewrites the rules for measuring the Universe's expansion rate: the local Hubble constant might drop by several km/s/Mpc. The drama of the Hubble tension — the discrepancy between the earl
arXiv:2606.05358v1 · 2026-06-03

Neutrino Lighthouse: The Hidden Heart of Supernova SN 2021foa

For the first time, a collapsing supernova is reliably linked to high-energy neutrinos. IceCube detected four neutrino events clustered in time and space near the peak brightness of SN 2021foa, a rare Type IIn supernova. The energy of the neutrino burst exceeded the optical by two orders of magnitud
arXiv:2606.06409v1 · 2026-06-04

The Flare's Fiery Heart: Ions Race Along Magnetic Lines

Solar flares crank temperatures up to millions of degrees, but iron ions move much faster along magnetic lines than across them. An international team, analyzing nearly 4,600 spectra from the Japanese Hinode satellite, proved for the first time that line broadening is driven not by turbulence but by
arXiv:2606.06577v1 · 2026-06-04

The Neutrino Chord: How a Supernova Will Unveil the Hidden Mass Order

The next galactic supernova is a rare gift to astrophysics, capable of answering a key particle physics question in a fraction of a second. Analysis of two independent signals—the sharp peak of electron neutrinos in the first milliseconds and the rise rate of the electron antineutrino flux—points to
arXiv:2606.06580v1 · 2026-06-04

The Dusty Truth: Why Supernovae Finally Spoke with One Voice

An international team led by Marco Giunto analyzed nearly a thousand Type Ia supernovae from the ZTF survey and showed that the differences in their color and brightness are almost entirely caused by dust in their host galaxies, not by the physics of the explosions themselves. This settles a long-st
arXiv:2606.06593v1 · 2026-06-04

PeVatron's Hybrid Orchestra: A Particle Symphony at the Edge

Astrophysicists have built a self-consistent model of the source LHAASO J1849-0002, associated with the pulsar PSR J1849-0001. In the hybrid scenario, relativistic electrons from the pulsar wind nebula scatter the cosmic microwave background, while protons collide with a nearby molecular cloud, prod
arXiv:2606.06974v1 · 2026-06-05

Broken Prism: How a Pulsar Became a Cosmic Ghost

In December 2019, the CHIME telescope picked up a signal with a crisp periodicity of 217 ms, hailed as the first periodic FRB. It later turned out to be a series of giant pulses from the long-known pulsar PSR J0248+6021, misprojected 20 degrees to the south. The culprit was a crack in the mathematic
arXiv:2606.07087v1 · 2026-06-05

Dark Matter's Invisible Sparks: Tiny Black Holes as Stellar Detonators

What if dark matter isn’t just passive, but can actually ignite stars? New research simulates white dwarf explosions triggered by the passage of a primordial black hole—a candidate for dark matter. Hydrodynamic simulations and nucleosynthesis calculations of 495 isotopes show that such Type Ia super
arXiv:2606.07505v2 · 2026-06-05

A Lens in the Depths: Why the Axion Limit Isn't Afraid of Exotics

Neutron stars are ultra-dense laboratories where matter is compressed to its limit, and hypothetical axions can reveal themselves through accelerated cooling. Even the addition of exotic baryons in the core hardly shifts the tight constraint on the axion mass; in some models, the limit brushes again
arXiv:2606.07742v1 · 2026-06-05

Hunting Ghost Particles from a Supernova

A new method will allow catching particles with a microscopic charge, born in supernova explosions. They arrive after neutrinos, like a delayed wave. Perhaps dark matter is made of exactly such particles.
arXiv:2606.11310 · 2026-06-09

Quantum Trick Accelerates the Universe Without Dark Energy

The universe is expanding at an accelerating rate. Usually this is blamed on dark energy. But a new explanation is post-selection, a quantum trick where the future selects scenarios that suit it. This removes the mystery and explains why the acceleration started just now.
arXiv:2606.12297 · 2026-06-10

The Law of Unified Cooling: What Links Blazars and Gamma-Ray Bursts

Blazars are long-lasting beams from black holes in galactic cores; gamma-ray bursts are short flashes from stellar explosions. Scientists have discovered that, despite their different timescales, their radiation is shaped by the rapid cooling of electrons in a weakening magnetic field. This explains
arXiv:2606.15759 · 2026-06-14

Ghostly Neutrinos Illuminate the Milky Way's Bubbles

A powerful explosion once erupted at the center of our Galaxy, creating two searing-hot bubbles. Neutrinos — ghostly particles — arrived from their edges, proving that shock waves there accelerate matter to incredible energies. The discovery offers a glimpse into the black hole's turbulent past.
arXiv:2606.22387 · 2026-06-21

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

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

Dancing Dispersion: The Millisecond Life of a Neutron Star

FRB 20250613A, caught in a dwarf galaxy at z=0.0987, surprised us: its dispersion varied 50 times within minutes. The bursts repeat with a rhythm of 6.8 ms, as if a neutron star is spinning. And most strikingly, the brighter the pulse, the cleaner the ether: the radio wave accelerates oncoming elect
arXiv:2607.00505v1 · 2026-07-01

15 Solar Masses: The Spin Frontier of Black Holes

Analysis of 259 gravitational-wave events revealed a sharp change in the effective spin χeff of binary black holes at around 15 M⊙. Below this threshold, spins tend to be positive and cluster in a narrow peak, while above it, the distribution broadens and becomes symmetric. It’s as if nature drew a
arXiv:2607.00565v1 · 2026-07-01

The Universe Isn't Getting Younger: Ancient Stars Rule Out "Early" Solutions

Astronomers led by Indranil Banik analyzed 155,600 subgiants from the LAMOST and Gaia catalogs. Bayesian age reconstruction revealed the oldest star at 13.73 billion years. Adding 0.2 billion years for the formation of the first stars gives a Universe age of about 13.93 billion years—a perfect match
arXiv:2607.00764v1 · 2026-07-01

Mirror Labyrinth of Dark Energy: How Galactic Twins Refract Cosmology

In pursuit of elusive dark energy, scientists have found a workaround: using pairs of independent gravitational lenses with nearly identical deflectors. Simulations for the LSST survey show that such 'pseudo-double' systems allow measuring the cosmological equation of state with unprecedented statis
arXiv:2607.01005v1 · 2026-07-01

The Smoking Gun of Hierarchy: Black Holes Betray Their Ancestors

Using a flexible mixed population model, scientists discovered a striking coincidence: the mass distribution of high-spin black holes exactly matches the distribution of remnant masses from the low-spin subpopulation. This ‘smoking gun’ proves that rapidly spinning black holes arose from hierarchica
arXiv:2607.01121v1 · 2026-07-01

Dark Energy: When the Constant Stops Being Constant

A team of astrophysicists conducted a systematic examination of extensions to the standard ΛCDM cosmological model, using data from telescopes like Planck, DESI, Pantheon+, and others. They added dynamic dark energy, spatial curvature, massive neutrinos, and additional inflationary parameters. It tu
arXiv:2607.01226v1 · 2026-07-01

Cosmic Radio: How a Neural Network Catches the Whisper of Neutron Stars

The Aframe algorithm, previously honed on black hole mergers, now teases out signals from binary neutron star mergers from the noise of gravitational wave detectors in fractions of a second. Thanks to a trick from the radio engineer's toolbox—heterodyning—minute-long 'chirps' are compressed to just
arXiv:2607.01372v1 · 2026-07-01

Galactic Recipe: How the Sun Stopped Being Special

Astrophysicists analyzed ultra-precise spectra of 79 solar twins and concluded: most Sun-like stars acquired their chemical makeup naturally—through Galactic evolution. Only a few candidates show signs of exoplanet ingestion. This confirms that our star is not an exception but a typical product of i
arXiv:2607.01699v1 · 2026-07-02

Sulfur Anomaly: B[e] Supergiant as a Photochemical Reactor

Using ALMA radio telescopes, astronomers peered into the vicinity of the extremely rare B[e] supergiant HD 87643 and found a rich array of sulfur-bearing compounds. The anomalously high concentration of SO₂ and the unusual sulfur isotope ratio indicate rapid photochemical processing of gas, as if in
arXiv:2607.02191v1 · 2026-07-02

Black Hole Cardiogram: NICER Records X-ray Heartbeat

In 2025, the NICER X-ray telescope aboard the ISS monitored the outburst of black hole 4U 1630−47, a binary system where matter from a companion star falls onto the compact object. Analysis revealed quasi-periodic oscillations (QPOs)—rhythmic flux variations with frequencies from 0.24 to 3.43 Hz—and
arXiv:2607.02228v1 · 2026-07-02

Dark Champagne: What Pulsars Revealed About the Phase Transition

Recently, pulsar timing array collaborations detected a stochastic background of nanohertz gravitational waves. Scientists investigated whether a first-order phase transition in the simplest dark sector — an Abelian Higgs model — could have produced it. Precision thermodynamic analysis using dimensi
arXiv:2607.02505v1 · 2026-07-02

Neutrino Tomography of Earth: A New Look at the Planet's Interior

Earth's internal structure is traditionally studied using seismic methods and gravimetry. But neutrinos—particles that barely interact with matter—offer a fundamentally different, gentle probe. The IceCube collaboration analyzed 10.7 years of muon neutrino observations with energies from 500 GeV to
arXiv:2607.02644v2 · 2026-07-02

Black Holes Remember More Than You'd Think

Black holes store more information than the infalling matter provides. This excess 'information load' shifts the frequency of gravitational waves during mergers, revealing their origin—stellar or quantum.
arXiv:2607.03560 · 2026-07-03

Dark Core or Pearlescent Layer: Metamorphoses of Neutron Stars

Scientists used an agnostic approach to study how dark matter affects neutron star structure. Light dark matter forms extended halos that boost tidal deformability, while heavy dark matter creates a dense core, making the star more compact. Constraints from NICER and GW170817 show that the fraction
arXiv:2607.03840v1 · 2026-07-04

Pendulum without heating: X-ray mystery of PSR J0901-4046

Observations by the Chandra space observatory set a record-low upper limit on X-ray luminosity for the periodic radio pulse source PSR J0901-4046. Its period—75.9 seconds—is too long for a classical pulsar: there isn't enough electric potential to pull particles out of the vacuum. It was thought tha
arXiv:2607.03848v1 · 2026-07-04

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

Magnetic Echolocation: Measuring the Cosmic Cocoons of Fast Radio Bursts

Fast radio bursts (FRBs) — millisecond signals of colossal energy — remain one of the great mysteries of astrophysics. Their environment is often saturated with magnetized plasma that distorts polarization and scatters the pulses. A new technique combines the analysis of these distortions, akin to d
arXiv:2607.05289v1 · 2026-07-06

Cosmic Tuning Fork: KLT-Net Neural Network Rewrites the Distance Ladder

Using 1701 Type Ia supernovae, the KLT-Net neural network reconstructs distance modulus for the first time without relying on cosmological models. The harmony of three architectures—KAN, LSTM, and Transformer—captures both local nuances and the global rhythm of expansion. The result: Hubble constant
arXiv:2607.06959 · 2026-07-08

Anchor in the Shallows: Why DESI Data Misses the Universe's Acceleration

Is the Universe accelerating its expansion—or not? The latest DESI survey, combined with Planck cosmic microwave background data, yields no clear answer for the current epoch, unlike older SDSS data. Researchers have shown that the root of the discrepancy is DESI's lack of measurements at low redshi
arXiv:2607.07348 · 2026-07-08

Dark Energy's Seesaw: A New Explanation for a Strange Signal

The mysterious force accelerating the universe turns out to be fickle. In a new model, dark energy is like steam that partially condenses into 'droplets' when cooled. Massive galaxy clusters act as refrigerators, their gravity creating pressure differences. This solves recent anomalies in supernova
arXiv:2607.08120 · 2026-07-09