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Physics
Hi-Tech
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AstroPhysics

Artist's impression of a magnetar with blue magnetic field lines and two beams whose light waves become aligned as they travel outward.

Magnetar Light Is 65% Polarized

By Gerd Dani / August 10, 2026

Two sheets of glowing blue spacetime joined by a narrow wormhole throat, with light streaming from the upper mouth.

Are Wormholes Real? Nothing Rules It Out

By Gerd Dani / August 8, 2026

Artist's impression of the holographic universe, with a ring of galaxies around a dark void beside a black sphere whose interior streams out as colored lines onto a flat surface.

Holographic universe: can we test it?

By Gerd Dani / August 7, 2026

Fringed, swirling edges around bright granules on the sun's surface, imaged at 416 nanometers by the Inouye Solar Telescope.

Kelvin-Helmholtz Instability on the Sun

By Gerd Dani / August 5, 2026

Golden winds from a quasar's supermassive black hole swirl through the blue gas of a galaxy cluster dotted with distant galaxies.

Black hole winds shake a galaxy cluster

By Gerd Dani / August 5, 2026

"Cosmic timeline running from the Big Bang through a spiral galaxy, nebula and supernova to the newborn Solar System and a human hand made of stardust."

Made of Stardust, From Big Bang to Bones

By Gerd Dani / August 2, 2026

Dark matter around Sagittarius A*

By Gerd Dani / August 1, 2026

SCGG-z5 and the lambda-CDM model of the early universe

Astronomy, AstroPhysics

SCGG-z5 and the lambda-CDM model of the early universe

By Denise Meloni / July 24, 2026

Concentric blue and gold shells of space spiral outward from a bright golden point at the center, illustrating the expanding observable universe.

How Big Is the Observable Universe? 93 Billion Light-Years

By Gerd Dani / July 24, 2026

Gamma-ray map of the extended source LHAASO J1912+1014u, outlined in white, with a dashed circle showing the Moon’s apparent size.

LHAASO J1912+1014u: Evidence for a Proton PeVatron

By Gerd Dani / July 23, 2026

Milky Way's tilted spiral disk glowing inside a wireframe grid of its surrounding dark matter halo against a starfield.

Astronomy, AstroPhysics

Did the Milky Way Disk Flip Sideways? New Evidence

By Gerd Dani / July 21, 2026

A blue fast radio burst crosses the glowing cosmic web from a distant galaxy toward an array of radio telescopes.

Astronomy, AstroPhysics

Missing Baryons: How FRBs Weigh the Cosmic Web

By Gerd Dani / July 18, 2026

Composite view of ten distant galaxies with spiral arms and bars shining above the NOEMA radio telescope dishes at dusk.

Astronomy, AstroPhysics

Do Spiral Arms and Bars Fuel Star Formation?

By Gerd Dani / July 16, 2026

Astrophotography visualization of the Orion Nebula hidden hydrogen shell, showing a glowing pink and blue core, a translucent outer bubble, and a sweeping gas protrusion. Overlaid text reads: Is The Orion Nebula Hiding 2/3 Of Its Gas From Us? Read on FreeAstroScience.

Astronomy, AstroPhysics

Orion Nebula hydrogen shell weighs less

By Gerd Dani / July 13, 2026

Astronomy, AstroPhysics, Research

Expansion of the Universe 2026: The Hubble Tension Crisis

By Gerd Dani / July 12, 2026

Two neutron stars collide at left, launching red gravitational-wave ripples and a glowing jet past a large radio telescope above Earth.

Astronomy, AstroPhysics, Research

Neutron Star Merger Hubble Constant: A Fresh Measurement

By Gerd Dani / July 11, 2026

Digital illustration comparing the three geometric models of the universe: a flat plane (Omega equals 1), a closed sphere (Omega greater than 1), and an open saddle shape (Omega less than 1), set against a deep space background with galaxies.

Astronomy, AstroPhysics

SHAPE OF THE UNIVERSE

By Gerd Dani / July 11, 2026

Swirling dark vortex illustrating a black hole event horizon emitting Hawking radiation as particles escape into space

How Hawking Radiation Makes Black Holes Evaporate

By Gerd Dani / July 11, 2026

NASA visualization showing a cross-section of Earth's Van Allen radiation belts as coloured bands wrapping the planet.

AstroPhysics, Physics

How Could Nuclear Weapon Detection in Space Work?

By Gerd Dani / July 10, 2026

Artist's concept of the most distant quasar: a blazing white accretion disc and jet around a supermassive black hole amid glowing red gas.

Astronomy, AstroPhysics, Research

What Is the Most Distant Quasar Ever Discovered?

By Gerd Dani / July 9, 2026

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