Insight
The Moon Is Drifting Away From Earth, and We Can Measure It to the Millimetre
The Moon is leaving. Slowly, by about 3.8 centimetres a year, roughly the speed your fingernails grow. That number is not an…
Universe
Space, stars, planets and the physics that holds them together.
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Insight
Insight
Why the Sun’s Outer Atmosphere Is Hotter Than Its Surface
Stand next to a campfire and step back, and you get cooler. That is how heat is supposed to work. The further…
Insight
Why Is the Night Sky Dark? The Paradox That Took 400 Years to Solve
Look up on a clear, moonless night and you see mostly black, punctured by a scattering of points of light. It feels…
Insight
What Voyager 1 Has Taught Us Since It Left the Solar System
Voyager 1 launched in 1977 to study Jupiter and Saturn up close. Nearly fifty years later, it’s still transmitting, still returning real…
Insight
Why Time Runs Slower Near a Black Hole
Time isn’t the same everywhere. That’s not a metaphor. According to general relativity, gravity actually slows the passage of time, and near…