Antigravity disproved: Antimatter responds to gravity just like matter

Antimatter has intrigued and confounded physicists for almost a century, and the effect of gravity on antimatter has been a point of disagreement. New research may have settled the debate by finding that antihydrogen atoms, the antimatter counterpart o… Continue reading Antigravity disproved: Antimatter responds to gravity just like matter

3-million-mile-high tsunamis crash down on “heartbreak” star

From strange stars to weird worlds and other odd objects that defy explanation, the cosmos constantly surprises us. Now astronomers have discovered a “heartbreak” star system where tidal waves, three times taller than the Sun, rise and crash on the sur… Continue reading 3-million-mile-high tsunamis crash down on “heartbreak” star

“Quantum gravity” clues could be hiding in the songs of black holes

Of the four fundamental forces of physics, gravity is the one we’re most familiar with in everyday life, but it’s also the only one that can’t currently be explained by quantum physics. Now scientists have outlined a plan to look for signs of quantum g… Continue reading “Quantum gravity” clues could be hiding in the songs of black holes

Puzzling astronomical observations support alternative theory of gravity

Astrophysicists have observed some puzzling behavior in star clusters that seem to defy our current understanding of gravity at cosmic scales. Intriguingly, the observations fit with an alternative theory of gravity that could negate the need for dark … Continue reading Puzzling astronomical observations support alternative theory of gravity

Artificial gravity reduces spaceflight’s health toll in fruit fly tests

Microgravity wreaks havoc on the bodies of astronauts, which is bad news given humanity’s space-bound ambitions. A NASA experiment housing fruit flies on the International Space Station has now shown that artificial gravity can help reduce some of thos… Continue reading Artificial gravity reduces spaceflight’s health toll in fruit fly tests

What is gravitational lensing and how can the James Webb Telescope use it?

If you’ve seen the first images from the James Webb Space Telescope (JWST) this week (and let’s face it, how could you not?), you might have heard the term “gravitational lensing” being thrown around. But what does it mean exactly? And how can it help … Continue reading What is gravitational lensing and how can the James Webb Telescope use it?

Physicists measure gravitational time warp to within one millimeter

The flow of time isn’t as consistent as we might think – gravity slows it down, so clocks on the surface of Earth tick slower than those in space. Now researchers have measured time passing at different speeds across just one millimeter, the smallest d… Continue reading Physicists measure gravitational time warp to within one millimeter

First-ever “rogue” black hole discovered zipping through the galaxy

Astronomers believe they’ve detected the first “rogue” black hole, roaming the galaxy alone. The object made itself known when it passed in front of a background star, bending the light with its extreme gravity.Continue ReadingCategory: Space, ScienceT… Continue reading First-ever “rogue” black hole discovered zipping through the galaxy

CERN experiments investigate whether antimatter falls up or down

Physicists at CERN have discovered that antimatter falls down. Sure, it sounds like an obvious thing, but scientists haven’t yet been able to confirm that it responds to gravity in exactly the same way as regular matter does. A new experiment provides … Continue reading CERN experiments investigate whether antimatter falls up or down