Today I was talking about electric potential. My favorite analogy for electric potential energy is gravitational potential energy. But electric potential is something different. Electric potential ...

The weak gravitational pull on a particle just half the mass of a grain of sand has been measured for the first time. This most precise measurement of its kind is a breakthrough towards the quantum ...

Physicists have measured the gravitational field of a smaller object than ever before, a gold sphere with a mass of about 90 milligrams. This could help us understand how gravity fits together with ...

Changing times: JILA researchers measured time dilation within this tiny cloud of strontium atoms. (Courtesy: R Jacobson/NIST) Two independent teams of researchers in the US have used differential ...

The Mathematical Gazette is the original journal of the Mathematical Association and it is now over a century old. Its readership is a mixture of school teachers, college and university lecturers, ...

Dark matter is an enigmatic form of matter not expected to emit light, yet it is essential to understanding how the rich tapestry of stars and galaxies we see in the night sky evolved. As a ...

Astronomers have directly detected elusive gravitational waves, 100 years after the existence of these spacetime ripples was first proposed by Albert Einstein in his theory of general relativity.

The Hubble constant H 0 measures the mean expansion rate of the Universe. At nearby distances (less than about 50 Mpc) it is well approximated by the expression Analysis of the gravitational-wave data ...

This week, a team of physicists published a paper in the journal Physical Review Letters with more than 1,000 contributing authors. As you might expect, this paper is of monumental historical ...

We just turned the volume up on the sky. Gravitational waves, the booming echoes of massive objects moving all over the universe, have been detected for the first time by LIGO, the Laser ...

These tiny ripples in the fabric of time and space are so faint that even Einstein, the person who first proposed them, believed they would never be detected When you purchase through links on our ...