nebulica

Where nebulae meet equations. Everything physics, every day.

[nebulica @nebulica]

Heliocentrism places the Sun at the center so every planet glides in simple circles.

Geocentrism locks Earth still and the planets must weave dense overlapping loops just to match the sky.

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Nothing in space ever truly stands still.

The solar system races around the galactic center at 800,000 km/h, while Earth circles the Sun at 107,000 km/h and the Moon travels around Earth at 3,700 km/h.

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“The mind of God we believe is cosmic music, the music of strings resonating through 11 dimensional hyperspace. That is the mind of God.”

— Michio Kaku

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"Teachers who make physics boring are criminals."

— Walter Lewin

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"The interplay between simplicity and complexity is the heart of our subject."

— Murray Gell-Mann

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“What we observe as material bodies and forces are nothing but shapes and variations in the structure of space and time.”

— Erwin Schrödinger

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Sir Walter Lewin shows how a ball released from 2.5 times the loop’s radius gains enough speed to complete the circle.

The experiment brings conservation of mechanical energy to life as gravity becomes motion and provides the centripetal force needed.

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“The Universe is not only stranger than we imagine, it is stranger than we can imagine.”

— Sir Arthur Eddington

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Sir Walter Lewin explains how a stretched spring pulls back toward equilibrium, with a restoring force that grows in direct proportion to its displacement.

That simple relationship is Hooke’s law: F = -kx. The farther the spring is stretched, the stronger its pull in the opposite direction.

[nebulica @nebulica]

That magnet isn't falling. It's locked in midair by the superconductor below, held there by flux pinning and the Meissner effect.

Pour ferrofluid on it and the liquid spikes along the field lines. An invisible force, suddenly visible.

[nebulica @nebulica]

"What we observe as material bodies and forces are nothing but shapes and variations in the structure of space and time."

– Erwin Schrödinger

[nebulica @nebulica]

"I cannot show you a tesseract because I, and you, are trapped in three dimensions."

— Carl Sagan

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“Not only is the Universe stranger than we think, it is stranger than we can think.”

— Werner Heisenberg

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"The most beautiful thing we can experience is the mysterious. It is the source of all true art and science."

— Albert Einstein

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Stokes Theorem connects a closed loop to the surface it surrounds.

The total push of a vector field around the edge equals the total spinning inside the surface. What happens on the boundary is decided by everything happening in the middle.

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“If you want to find the secrets of the universe, think in terms of energy, frequency and vibration.”

— Nikola Tesla

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"The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful."

— Henri Poincaré

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Fourier epicycles layering infinite sines and cosines into a blooming nautilus spiral of fractal flowers. Pure mathematical magic unfolding in just 20 seconds! By George Savva.

One of the most mesmerizing ways to see mathematics come alive.

[nebulica @nebulica]

A few LEDs and resistors can show the charge left in a 12V battery.

Each LED needs a different voltage to light. The resistors set four clear thresholds. As voltage drops, higher LEDs go dark first green for full, red for empty.

[nebulica @nebulica]

“People who wish to analyze nature without using mathematics must settle for a reduced understanding.”

— Richard Feynman