For the Earth, which is shaped like a ball, the force of gravity pulls you to the centre from every point on the ground.
Cindy Zhi/The Conversation NY-BD-CC
Instead of pulling us to the top or bottom, the force of gravity pulls us to the middle of the Earth.
What goes in doesn’t go out?
The famous cosmologist was closely identified with black holes due to his revolutionary theoretical work explaining some of their mysterious properties.
Marcella Cheng/The Conversation
To stay up, the bird must overcome gravity with a force called 'lift'.
National Police Air Service
No matter how cold it is, you're lucky you don't live on Venus.
Seismic shockwaves after a meteorite’s collision could affect systems all over the planet.
Research suggests a new threat to life on Earth from the meteorite's crash: Via seismic waves, the impact triggered massive undersea eruptions, as big as any ever seen in our planet's history.
The mass of the Earth is big enough that the gravitational force it creates can pull the hard shape of ice, rock and metal into a sphere.
NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center
Imagine the Earth pulling everything it is made up of, all of its mass, towards its centre. This happens evenly all over the Earth, causing it to take on a round shape.
Sofia Boutella plays the new Mummy.
The latest reboot of The Mummy is all you should expect from a Hollywood blockbuster on an ancient Egyptian curse. But what about the science?
Between the Earth and the moon: An artist’s rendering of a refueling depot for deep-space exploration.
Sung Wha Kang (RISD)
To get us to Mars and beyond, a team of students from around the world has a plan involving lunar rovers mining ice and a space station between the Earth and the moon.
Look ma, no gravity!
Every moment of life on our planet has had the force of gravity in the background. But the prospect of long-distance space travel means it's time to figure out what happens to our biology in its absence.
An artist’s impression of a Sun-like star close to a rapidly spinning supermassive black hole, with a mass of about 100 million times the mass of our Sun.
ESA/Hubble, ESO, M. Kornmesser
The discovery of a new black hole adds to our understanding of these celestial objects that fascinate in both fact and fiction.
There’s a lot we still don’t know about antimatter.
One of the great mysteries of the universe is why there is so much more matter than antimatter. Now a new experiment is helping us understand the nature of antimatter better than ever before.
Einstein’s theories are still not taught in school.
Einstein's theories of relativity underpin our understanding of the universe, yet they're not taught in high school. How can we change that?
Why weightlessness in space is about balancing forces rather than a lack of gravity.
There's a good reason you should care about the discovery of gravitational waves, even if you don't understand the science.
A team effort: Dr David Reitze, of the LIGO Laboratory at Caltech, shows the merging of two black holes that led to the detection of gravitational waves.
The discovery of gravitational waves involved a team of more than 1,000 scientists from across the globe, including Australia. So how does such an international collaboration work?
Massive bodies can send ripples through space time in the form of gravitational waves.
The long awaited discovery of gravitational waves has sent ripples through the scientific world. Here top experts respond to the historic announcement.
When two black holes collide, the resulting gravitational ripples can be felt across the cosmos.
The detection of gravitational waves is the final confirmation of Einstein's theory of general relativity, and opens up a new window into the cosmos.
Binary black holes come in a variety of forms, but they are all astounding.
NASA, ESA, and G. Bacon (STScI)
It takes something as stupendous as the merger between two black holes to generate detectable gravitational waves. Here's how such incredible cosmic objects form.
Two black holes collide.
University of Glasgow
It is the physics discovery of the century – even bigger than the Higgs Boson. Here's how it happened and what it means, by a key member of one of the lead teams
Struggle to understand modern physics? Blame Einstein.
Space, time and space-time: it's all relative.