In the first all-sky survey by the eROSITA X-ray telescope onboard SRG, astronomers at the Max Planck Institute for Extraterrestrial Physics have identified a previously unknown supernova remnant, dubbed “Hoinga.” The finding was confirmed in archival radio data and marks the first discovery of a joint Australian-eROSITA partnership established to explore our Galaxy using multiple wavelengths, from low-frequency radio waves to…
Tag: radio waves
What is a quasar?
A quasar is an extremely bright and distant point-like source visible to radio telescopes. The source is a so-called Active Galactic Nucleus, fueled by a supermassive black hole. Source: https://earthsky.org/astronomy-essentials/definition-what-is-a-quasar…
The First Black Hole Ever Discovered is More Massive Than We Thought
Neel V. Patel, writing at MIT Technology Review: Einstein first predicted the existence of black holes when he published his theory of general relativity in 1916, describing how gravity shapes the fabric of spacetime. But astronomers didn’t spot one until 1964, some 6,070 light-years away in the Cygnus constellation. Geiger counters launched into space detected cosmic x-rays coming from a region…
Galaxies have magnetic fields, too! Images here
Until recently, magnetic fields in the outskirts of galaxies were too faint to be detected. Although it’s still not clear what causes them or how they’re maintained, astronomers have started to create images of their observations of galaxies’ magnetic fields producing beautiful aurora-like effects. See them here. Source: https://earthsky.org/space/images-of-magnetic-fields-in-galaxies…
Is a solar flare the same thing as a CME?
Solar Cycle 25 is here, and that means – in the years ahead – more solar flares and more coronal mass ejections, or CMEs. People sometimes use the words interchangeably, but they’re not the same thing. Here’s the difference. Source: https://earthsky.org/space/is-a-solar-flare-the-same-thing-as-a-cme…
Space weather in Proxima’s vicinity dims hopes of habitable worlds
Astronomers used radio waves to study conditions in the vicinity of Proxima Centauri, the nearest star to our sun. The results suggest Proxima’s 2 known planets are likely bathed in intense radiation from this star, casting doubt on the planets’ potential for life. Source: https://earthsky.org/space/proxima-centauri-space-weather-planets-uninhabitable…
Weird radio beam probably isn’t aliens but it’s the best candidate yet
The Breakthrough Listen project has found a strange beam of radio waves from Proxima Centauri, which is the team’s best candidate yet for an alien signal Source: https://www.newscientist.com/article/2263645-weird-radio-beam-probably-isnt-aliens-but-its-the-best-candidate-yet/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
Academics Turn RAM Into Wi-Fi Cards To Steal Data From Air-Gapped Systems
Academics from an Israeli university have published new research today detailing a technique to convert a RAM card into an impromptu wireless emitter and transmit sensitive data from inside a non-networked air-gapped computer that has no Wi-Fi card. From a report: Named AIR-FI, the technique is the work of Mordechai Guri, the head of R&D at the Ben-Gurion University of the…
We’ve mapped a million previously undiscovered galaxies beyond the Milky Way. Take the virtual tour here.
Astronomers have mapped about a million previously undiscovered galaxies beyond the Milky Way, in the most detailed survey of the southern sky ever carried out using radio waves. Source: https://phys.org/news/2020-12-weve-million-previously-undiscovered-galaxies.html…
What is a supernova?
A supernova is a star’s colossal explosion at the end of its life, potentially outshining its entire galaxy. Read about the causes and types of supernovae here. Source: https://earthsky.org/astronomy-essentials/definition-what-is-a-supernova…