Earth experiences constant volcanic activity - here’s Indonesia’s Mount Anak Krakatau (Child of Krakatoa) photographed in July 2018.
Compared to Earth, more "oomph" is required to bring magma to the surface of Mars, and this is probably why we haven't seen any recent eruptions on the red planet.
eso a CROP.
It's all about the strong gravitational field of the black hole.
Jumping in elevators is fun. If you like jumping.
Mavis Wong/The Conversation
If you fall one storey, dust yourself off – you'll be fine. If you fall seven storeys: sorry, but you've probably got about 2 seconds to prepare to meet your maker.
An artist’s impression of the path of star S2 as it passes very close to the supermassive black hole at the centre of the Milky Way. The very strong gravitational field causes the colour of the star to shift slightly to the red. (Size and colour exaggerated for clarity.)
Astronomers traced a single star as it passed close to the black hole at the centre of our galaxy, and detected the telltale signature of Einstein’s gravity in action.
Triple star system involving a pulsar suggests Einstein was right.
An extreme laboratory in space involving three dead stars has shown that all objects really do accelerate identically, proving Einstein right.
Nearly 50 years since the first man walked on the moon, our morals are still stranded on Earth.
Artist conception of a tidal disruption event (TDE) that happens when a star passes fatally close to a supermassive black hole.
Sophia Dagnello, NRAO/AUI/NSF.
A team of astronomers captured the moment when a wayward star was pulled into the mouth of a supermassive black hole.
In fact, some things are slowing the Earth down or could change its spinning in the future.
To answer this tricky question, we have to look back in time to when the Earth was born, 4.5 billion years ago.
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?