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.
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.)
ESO/M. Kornmesser
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.
Kevin Gill/Flickr
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.
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
The famous cosmologist was closely identified with black holes due to his revolutionary theoretical work explaining some of their mysterious properties.
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.
Universal Pictures
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.
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
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.
Wikimedia