Blue-white starlight looks like a death sentence for ice, yet physics quietly disagrees. That intense glow comes from high surface temperature and strong emission in ultraviolet, but the inverse-square law means energy thins out fast with distance, so a planet only slightly farther out can receive less power per square meter than Earth gets from its milder star.
The bigger surprise is that even relatively close orbits are not automatically doomed. A high-albedo surface or cloud deck can reflect much of that incoming flux, and the Stefan–Boltzmann law then locks in a low equilibrium temperature, especially if the atmosphere is thin or stripped by the star’s wind so that greenhouse trapping stays weak. Energy in, energy out. Ice wins that accounting if reflection and radiation dominate over absorption.
The harsh spectrum does shift the rules, and that matters more than raw brightness. Strong ultraviolet can erode atmospheres and drive photochemistry, but it can also leave behind a bare, bright, icy shell that bounces light like a mirror while efficiently cooling in infrared. Around a blue-white star, the coldest worlds can sit startlingly close, hiding in plain sight inside the glare.
