If you simultaneously drop a feather and a bowling ball in a vacuum, they’ll hit the ground at the same time. In other words, despite their mass, they’re affected by a gravitational field in exactly the same way. The same goes for massive objects like stars, according to Einstein’s Theory of Relativity, and astrophysicists have confirmed his inference. Continue reading Scientists confirm the basis of Einstein’s Theory of Relativity
When life gives you lemons, make lemonade, right? That, at least, is the motto the European Space Agency seems to have embraced with respect to two wayward satellites, which are being repurposed to provide the most accurate assessment yet of how gravity affects the passage of time.
Ripped from the pages of a sci-fi novel, physicists have crafted a wormhole that tunnels a magnetic field through space.
“This device can transmit the magnetic field from one point in space to another point, through a path that is magnetically invisible,” said study co-author Jordi Prat-Camps, a doctoral candidate in physics at the Autonomous University of Barcelona in Spain. “From a magnetic point of view, this device acts like a wormhole, as if the magnetic field was transferred through an extra special dimension.”
A brilliant “ring of fire” has been spotted in deep space, giving astronomers a rare glimpse of a galaxy 12 billion light-years away.
The near-perfect “Einstein ring” was captured at a super-high resolution of 23 milliarcseconds by the Atacama Large Millimeter/submillimeter Array (ALMA), a ground telescope in the Atacama desert in Northern Chile.