☀️ The Heart of Our Solar System: Today is International Sun Day

Imagine a burning sphere so vast that more than a million Earths could fit inside it.

Actually, you don’t have to imagine it — just look up.

The Sun contains about 99.8% of all the mass in the Solar System. Everything else — planets, moons, asteroids, comets — is almost a rounding error compared with our star.

Its visible “surface,” the photosphere, is around 5,500°C. Deep in the core, where nuclear fusion turns hydrogen into helium, temperatures reach about 15 million°C. To match the Sun’s energy output, you would need to detonate roughly 100 billion tons of dynamite every second.

The Sun is about 4.6 billion years old, born from a collapsing cloud of gas and dust. It still has enough nuclear fuel to shine for roughly another 5 billion years. After that, it will expand into a red giant, shed its outer layers, and leave behind a dense white dwarf — the fading core of what once powered life on Earth.

And the image/video behind this post is not AI, not Photoshop, and not CGI.

It was created by American astrophotographer Andrew McCarthy, who captured skydiver Gabriel C. Brown falling across the face of the Sun in the Arizona desert on November 8, 2025. The shot, titled “The Fall of Icarus,” required radio coordination, telescopes, solar filters, and six attempts to align a human body with the solar disk for a fraction of a second.

A human silhouette against a star.

Science, timing, and myth — all in one frame.

Visuals: Andrew McCarthy / Gabriel C. Brown

@science