In a picture: ‘Now we know what a black hole looks like’

by Jonathan O’Callaghan The first-ever image of an event horizon – the gravitational boundary of a black hole beyond which light cannot escape – was revealed on 10 April and is the best evidence yet that these phenomena really do exist. It was the result of a global collaboration of hundreds of scientists, using multiple … Read more

Astronomers reveal first-ever image of a black hole

Image credit - EHT Collaboration

by Jonathan O’Callaghan Scientists have revealed the first ever image of a black hole, a major milestone in astrophysics which not only backs up Einstein’s theory of general relativity but also opens up a new era of black hole observations. The image shows the event horizon – the gravitational point of no return beyond which nothing, … Read more

Gravitational waves helping to expose black holes, dark matter and theoretical particles

Image Credit - LSC/Alex Nitz

Gravitational waves – the invisible ripples in the fabric of space predicted by Albert Einstein – are opening up a new era of astronomy that is allowing scientists to see parts of the universe once thought to be invisible, such as black holes, dark matter and theoretical subatomic particles called axions. Almost 100 years after … Read more

Fleets of autonomous satellites to coordinate tasks among themselves

Image credit - Earth Science and Remote Sensing Unit, NASA Johnson Space Center

Space missions have long benefited from some autonomous operations being carried out aboard spacecraft, but with a sharp increase expected in the number of satellites being launched in the next few years, researchers are using automation and artificial intelligence to make them smarter and more effective. Technology firms and researchers see scope for giving satellites … Read more

Greener fuels to propel rocket launches into space

Hydrazine, the most common rocket propellant, is on the EU’s list of substances of high concern.

by Ethan Bilby Turns out, green fuels are rocket science. Space exploration may have given us pictures of our pristine, blue planet Earth and raised awareness to protect our environment, but that’s no good if the rockets that get us to orbit are based on old, toxic propellants. For decades, the most common rocket propellant has … Read more

How scientists are piecing together the history of the moon

ANDY SMITH ASTRONOMY

In the solar system’s early days, a first Earth is thought to have been pulverised by a planet that scientists call Theia. We don’t know what it was made of or where it came from, only that it may have been the size of Mars. The powerful collision destroyed both planets so completely that scientists … Read more