Space 01
Why Stars Twinkle but Planets Don't (With the Math)
Stars twinkle because they are points that cross one 7 cm air patch at a time. Planets span hundreds of patches. Here is the arcsecond math, with figures.
Space
Space 02
Why Is the Sky Dark at Night? Olbers' Paradox Solved
In an infinite, eternal universe every sightline ends on a star and the sky would blaze like the Sun. The math of Olbers' paradox and the real answer.
Space 03
Why Does Venus Spin Backwards? The Tidal Explanation
Venus turns once every 243 days, backwards, giving a 116.75-day solar day. Why atmospheric tides, not a giant impact, are the leading explanation.
Space 04
Moon Illusion Explained: Why the Horizon Moon Looks Big
The horizon Moon looks huge, yet it's 1.7% narrower and 16% shorter than overhead. We measure it, then weigh the theories for why your brain inflates it.
Space 05
How Fast Is Earth Moving Through Space? Every Frame
Earth spins at up to 465 m/s, orbits at 29.8 km/s and moves at 370 km/s relative to the CMB. How each speed is measured, and why they don't add.
Space 06
Why the 2027 Solar Eclipse Lasts 6 Minutes 23 Seconds
The 2 August 2027 eclipse gives 6 min 23 s of totality near Luxor. We compute why: a near-perigee Moon, a far Sun, and a shadow slowed by Earth's spin.