Time moves differently in space. Near black holes, gravity slows clocks and stretches seconds. This explainer reveals how time bends and affects astronauts and Earth.

In 1905, Albert Einstein revolutionized physics by demonstrating that time is not absolute but relative to the observer's ...

Recent James Webb Space Telescope data confirms a decade-old theory that the universe's earliest supermassive black holes ...

A team of physicists has discovered a surprisingly simple way to build nuclear clocks using tiny amounts of rare thorium. By electroplating thorium onto steel, they achieved the same results as years ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at ...

These are missions only NASA can lead. Everything else should go to partners who can deliver faster and cheaper.

While the US is attempting to come up with CLT, researchers from the Purple Mountain Observatory in Nanjing and the ...

Albert Einstein, a renowned scientist, revolutionized our understanding of the universe. His theory of relativity and the ...

The most precise clocks ever built are now testing Einstein, hunting dark matter, and reshaping how we define time itself. In A Nutshell The world’s most precise clocks are changing how we understand ...

CAPE CANAVERAL SPACE FORCE STATION — Despite the number of struggles Relativity Space has faced trying to get the world’s first 3D-printed rocket off the ground, it finally succeeded Wednesday night, ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works extremely well in its own domain: Quantum theory explains how atoms and ...