Category Astronomy/Space

Black Hole Billiards in the Centers of Galaxies

Illustration of a swarm of smaller black holes in a gas disk rotating around a giant black hole . Interactions between three black holes, such as those shown in the foreground, occur relatively often and will with high probability result in a merger on a non-circular orbit (credit: J. Samsing/Niels Bohr Institute)

Researchers provide the first plausible explanation to why one of the most massive black hole pairs observed to date by gravitational waves also seemed to merge on a non-circular orbit. Their suggested solution, now published in Nature, involves a chaotic triple drama inside a giant disk of gas around a super massive black hole in a galaxy far, far away.

Black holes are one of the most fascinating objects in the Universe, but our knowledge of them is still limited — especi...

Read More

Wormholes help Resolve Black Hole Information Paradox

Figure 1: As depicted in science fiction, a wormhole is a shortcut connecting two points in spacetime. A RIKEN physicist and two collaborators have used a new spacetime geometry with a wormhole-like structure to show that information is not necessarily irretrievably lost from black holes as they evaporate. © MARK GARLICK/SCIENCE PHOTO LIBRARY

A RIKEN physicist and two colleagues have found that a wormhole—a bridge connecting distant regions of the Universe—helps to shed light on the mystery of what happens to information about matter consumed by black holes.

Einstein’s theory of general relativity predicts that nothing that falls into a black hole can escape its clutches...

Read More

Space Station to host ‘Self-Healing’ Quantum Communications Tech Demo

SEAQUE will be hosted on the International Space Station by the Nanoracks Bishop airlock. The blue-and-gold brackets attached to the side of the airlock are for external payloads. The technology demonstration will be installed at one of those sites.
Credit: NASA

A tiny experiment launching to the International Space Station later this year could set the stage for a future global quantum network. Called the Space Entanglement and Annealing QUantum Experiment (or SEAQUE), the milk-carton-size technology demonstration will test two communications technologies in the harsh environment of space.

Quantum computers hold the promise of operating millions of times faster than conventional computers, and distributed quantum sensors may lead to new understandings of Earth and our place in the u...

Read More

Solar Storms can Destroy Satellites with ease: A Space Weather expert explains the science

On Feb. 4, 2022, SpaceX launched 49 satellites as part of Elon Musk’s Starlink internet project, most of which burned up in the atmosphere days later. The cause of this more than US$50 million failure was a geomagnetic storm caused by the sun.

Geomagnetic storms occur when space weather hits and interacts with the Earth. Space weather is caused by fluctuations within the sun that blast electrons, protons and other particles into space. When space weather reaches Earth, it triggers many complicated processes that can cause a lot of trouble for anything in orbit. And engineers are working to better understand these risks and defend satellites against them.

What causes space weather?

The sun is always releasing a steady amount of charged particles into space...

Read More