From exploding stars to black holes and auroras over the Low Countries. Ultranova makes the most extreme physics in the universe understandable — no noise, no jargon.
Discover the supernova Start stargazingThis site is alive. The Nova Engine — a Neuralex AI product — refreshes this automatically every hour.
In-depth guides to the most spectacular phenomena in the universe — written for curious earthlings.
The explosion that outshines entire galaxies. How do stars die — and why do we owe our existence to their death?
Read the guide → 🕳️Where space and time cease to exist. From the event horizon to the first real photo of a black hole.
Read the guide → 🔭No telescope required. What you can see tonight with the naked eye — and how to get serious in four steps.
Read the guide → 🛰️The space telescope that looks further back in time than anything before it. These findings are rewriting the textbooks.
Read the guide → 🌌Yes, really — more often than you'd think. When, where and how to spot the aurora at low latitudes.
Read the guide → ☄️Free fireworks all year round. The full calendar from Perseids to Geminids — and how to see the most.
Read the guide → 🪐Over 5,500 worlds around other stars. How we find them — and how close we are to evidence of life.
Read the guide → ⚡A teaspoon weighs a billion tonnes. Cosmic lighthouses, magnetars and the universe's gold factory.
Read the guide → 🌀You live in a 100,000-light-year spiral galaxy. From our quiet suburb to the black hole downtown.
Read the guide → 🌠Not an explosion in space, but the beginning of space itself. Plus: why expansion keeps accelerating.
Read the guide →An ultranova is a stellar explosion that outclasses even supernovae. That is our bar: the most extreme subjects, explained with the greatest clarity.
Guides that go beyond headline science while staying genuinely readable — physics without the pain.
Ultranova is a Neuralex initiative, combining human editing with AI research for accurate, current content.
No clickbait, no paywall. Just the universe at its most impressive.