Gravity

One of the biggest cosmological mysteries centers on a discrepancy in how fast the universe is expanding. A new study comes to an intriguing solution by applying a modified theory of gravity and an unsettling “supervoid” that our galaxy resides in.

Scientists have manipulated light as though it was being influenced by gravity. By carefully distorting a photonic crystal, the team was able to invoke “pseudogravity” to bend a beam of light, which could have useful applications in optics systems.

Our solar system officially houses eight planets, but some scientists say there could be a ninth hiding on the fringes. Now, a new study has found the oddities could be explained by modified theories of gravity, an alternative idea to dark matter.

Gravity's effect on antimatter has been a point of disagreement between physicists. New research may have settled the debate by finding that antimatter is affected by gravity in the same way as matter, ruling out the existence of repulsive 'antigravity.'

The cosmos is full of surprises. Now astronomers have discovered a “heartbreak” star system where tidal waves, three times taller than the Sun, rise and crash on the surface of a giant star thanks to the motions of a smaller companion star.

Gravity is the only fundamental force that can’t currently be explained by quantum physics. Now scientists have outlined a plan to look for signs of quantum gravity out in the cosmos by listening in to the 'ringing' of colliding black holes.

Astrophysicists have observed puzzling behavior in star clusters that defies 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 matter.

Microgravity wreaks havoc on astronauts' biology, which is bad news for future space travel. A NASA experiment housing fruit flies on the International Space Station has now shown that artificial gravity can help reduce some of those health problems.

If you’ve seen the first images from the James Webb Space Telescope this week, you might have heard the term “gravitational lensing” being thrown around. But what does it mean exactly? And how can it help this new telescope make discoveries?

The flow of time isn’t as consistent as we might think – gravity slows it down, so clocks on Earth tick slower than those in space. Now researchers have measured time passing at different speeds across just one millimeter, the smallest distance yet.

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.

Physicists at CERN have discovered that antimatter falls down. It sounds obvious, but scientists hadn’t yet been able to confirm that it responds to gravity in the same way as regular matter does. A new experiment provides the best answer so far.