Science — space, principles, structures, phenomena
The eerie blue glow of a reactor pool is not the color of radioactivity, nor a broken speed limit of light. It is a ‘sonic… Read More »Why Do Reactor Pools Glow Blue? Cherenkov Radiation and Particles Faster Than Light in Water
A superconductor floating above a magnet stays put even when flipped or tilted. The force that lifts it and the force that locks it are… Read More »A Metal Disk Frozen in Mid-Air — Why a Superconductor Won’t Fall Even Hanging Upside Down
In 2025 a third visitor from beyond the solar system, 3I/ATLAS, passed through. How do we know it came from outside? Its unclosing hyperbolic orbit… Read More »The Third Visitor from Beyond: 3I/ATLAS — How Do We Know It Came From Outside the Solar System?
The blue sky and the red sunset are two faces of the same Rayleigh scattering. Yet on Mars the daytime sky is reddish and the… Read More »Why Is the Sky Blue and the Sunset Red — and Why the Opposite on Mars?
Water expands by about 9% when it freezes, and ice floats on water. We trace two distinct phenomena — the 4°C density maximum and the… Read More »Why Does Water Expand When It Freezes? The 4°C Secret, Why Ice Floats, and How Life Survives Winter
The light of an aurora is, in fact, a picture drawn by particles that traveled some 150 million km from the Sun to meet Earth’s… Read More »Aurora: The Curtain of Light the Solar Wind Paints Across the Sky
