Category Archives: Relativity

The Real-Life Space Twin Paradox

A photograph featuring twin astronauts Mark and Scott Kelly in their NASA uniform.
Twin Astronauts

A ground-breaking one-year space mission involving twin astronauts Mark and Scott Kelly should help doctors, scientists and mission planners better understand the physical and psychological impacts of a long-duration spaceflight.

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The Field Equations of General Relativity

An artist's impression of the Earth's gravity field as described in Einstein's General Relativity.

Keeping It Relatively Simple

The Einstein Field Equations of General Relativity are vast and complex, but they can be written with deceptive simplicity. 

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