Space 01
Universe Zoom Out: From an Astronaut to the Edge of the Observable Universe
Universe zoom out in 17 true-scale steps, from a 2 m astronaut to the 93 billion light-year observable universe, with real NASA, Hubble and Webb images.
Space
Space 02
Is Kessler Syndrome Real? Gravity's Debris vs Reality
Is Kessler syndrome real? Yes, but it unfolds over decades, not Gravity's 90 minutes. Real debris counts, collision speeds and impact energies, computed.
Space 03
Why Are Planets Round but Asteroids Aren't? The Math
Gravity rounds a world once its central pressure beats the strength of rock or ice. We compute the threshold: about 200 km for ice, 300 km for rock.
Space 04
What Color Is the Sun Really? White, and Here's Why
The Sun is white: a 5772 K spectrum excites all three cone types almost equally. Why it peaks near green but never looks green, and why it turns orange.
Space 05
3 Body Problem: The Real Physics of Trisolaris
We simulate a real three-body system in Python, show how chaos ends Trisolaris's stable eras, and explain why the real Alpha Centauri is calm.
Space 06
How Do We Know How Far Away Stars Are? Parallax Math
Proxima Centauri shifts 0.768 arcsec a year, which puts it 4.2465 light-years away. Here is the parallax math, what Gaia changed and the distance ladder.