The light of a supernova that has traveled for 10 billion years to reach us has given us a new measurement of the Hubble constant - the accelerating rate at which the Universe is expanding.
Scientists have grappled with the fundamental forces that govern our universe, chief among them being gravity, and more recently, dark matter.
A new study suggests that gravity becomes about 1% weaker at very large scales. If gravity behaved according to Einstein's theory, then this 1% difference shouldn't exist.
Researchers have discovered that in the exotic conditions of the early universe, waves of gravity may have shaken space-time so hard that they spontaneously created radiation.
Way back in 1979, astronomers discovered that cluster's mass distribution formed a lens that distorted the light. Now EU astronomers have spotted time delaying effect with another distant quasar.
New NASA research confirms that Saturn is losing its iconic rings at the maximum rate. The rings have less than 100 million years to live. This is relatively short, compared to Saturn's age of over 4 billion years.
This is just the latest result from efforts around the world to create the best-ever atomic clock. Perhaps these clocks could detect dark matter from the way its gravity alters spacetime.
Researcher in the Netherlands believes even gravity can be harnessed to produce free electricity on a scale sufficient to power small appliances.
Merging Neutron Stars Challenge Existing Theories of Gravity and Dark Energy.
A team from the Netherlands has tested the new theory of theoretical physicist Erik Verlinde for the first time through the lensing effect of gravity.
Amelia Stutz and Andrew Gould from the Max Planck Institute for Astronomy in Heidelberg are bringing gravity and magnetic fields into play. To test their idea, they undertook a detailed investigation of the Orion Nebula, 1300 light-years away.
The genius of Albert Einstein lead us to gravitational waves - maybe someday another genius will work out how to make them, says Dr Karl.
In the last few decades, researchers have pursued the problem in two separate programs—string theory and loop quantum gravity—that are widely considered incompatible by their practitioners. But now some scientists argue that joining forces is the way forward.
(PhysOrg.com) -- In 1998, scientists discovered that the Universe is expanding at an accelerating rate. Currently, the most widely accepted explanation for this observation is the presence of an unidentified dark energy, although several other possibilities have been proposed. One of these alternatives is that some kind of repulsive gravity – or antigravity – is pushing the Universe apart. As a new study shows, general relativity predicts that the gravitational interaction between matter and antimatter is mutually repulsive, and could potentially explain the observed expansion of the Universe without the need for dark energy.
