Europe's Galileo satellite navigation system – already serving users globally – has now provided a historic service to the physics community worldwide, enabling the most accurate measurement ever made ...

Two satellites constructed and launched by the European Space Agency will spend the next year testing Albert Einstein’s general theory of relativity, which was proposed in a paper the famed German ...

We think it’s obvious that the Earth goes around the sun, today, but back before Copernicus, detractors had the most obvious argument possible against heliocentrism. To combat this, in his argument in ...

When two Galileo global navigation satellites were launched into the wrong orbit last year, scientists decided to turn the multimillion dollar accident into the most rigorous test yet of Einstein’s ...

We preselected all newsletters you had before unsubscribing.

In the 17th century, famed astronomer and physicist Galileo Galilei is said to have climbed to the top of the Tower of Pisa and dropped two different-sized cannonballs. He was trying to demonstrate ...

Thirty-five years after Moon-walking astronauts placed special reflectors on the lunar surface, scientists have used these devices to test Albert Einstein's general theory of relativity to ...

Pop quiz, hotshot. You've just launched a pair of GPS satellites into the wrong orbit, rendering them useless for navigation. What do you do? If you're the European Space Agency (ESA), you re-purpose ...

After Einstein developed his theories of special and general relativity, in 1905 and 1916, respectively, the world of physics changed dramatically. The theories, with their groundbreaking ideas on ...

Yesterday, I wrote about the core concepts needed to understand quantum physics, which is one of the two pillars of modern physics. The other, of course, is the theory of relativity, the full and ...