Language Selection

English French German Italian Portuguese Spanish

Radio receivers record cosmic rays hitting Earth

Filed under

A small prototype array in Germany has detected several radio flashes from cosmic rays that smack into the Earth's upper atmosphere. A larger array, with more of these low-cost radio antennas, could help astrophysicists decipher the mystery behind the highest energy cosmic rays.

Cosmic rays are high-speed sub-atomic particles - mostly nuclei and protons - that zip around space in all directions. Lucky for us, they cannot plow very far into our atmosphere before they collide with a gas molecule.

From these collisions come showers of secondary particles - including electrons, anti-electrons (called positrons), and muons, which are like heavy electrons. Cosmic rays can be characterized by the showers they produce.

Surprisingly, some of these space-faring projectiles have a 100 million times more energy than is possible in man-made accelerators. There are no "cosmic accelerators" in our galactic neighborhood that seem powerful enough to generate particles with this much energy.

Therefore, these so-called ultra-high energy cosmic rays (UHECRs) presumably come from colliding galaxies or large black holes hundreds of millions of light years away. But that raises a problem: cosmic "stuff" along the way will slow - or even outright destroy - high-energy particles traveling these great distances.

Full Story.

More in Tux Machines

What Are Linux Meta-packages?

I was recently in a discussion about meta-packages, and realized many users don’t know what they are or what they do. So, let’s see if we can clear-up the mystery. Meta-packages in a nutshell A ‘meta-package’ is a convenient way to bulk-install groups of applications, their libraries and documentation. Many Linux distributions use them for a variety of purposes, from seeding disk images that will go on to become new releases, to creating software “bundles” that are easy for a user to install. A meta-package rarely contains anything other than a changelog and perhaps copyright information, it contains no applications or libraries within itself. The way they work is by having a list of “dependencies” that the package manager reads. The package manager then goes to the repositories to find the dependencies and installs them. (Read the rest at Freedom Penguin)

Antenna recommendation

Astros vs Yankees Live Streaming

Ally Skills Training at LinuxCon 2015: Uniting All the World’s Geeks, No Exceptions

In a culture that celebrates freedom and resists conformity, establishing rules and regulations isn’t always easy. So when LinuxCon introduced its Code of Conduct in 2010, it became one of the first open source conferences to outline an anti-harassment policy and act on reports of misconduct. Today, similar codes of conduct are in place at hundreds of conferences and events worldwide -- and this year’s LinuxCon continues to see more women on panels and at the podium than ever before. It all came about thanks to work between Valerie Aurora, former kernel developer and open source diversity champion, and leaders at the Linux Foundation. But they didn’t stop with the Code of Conduct. In the past year, LinuxCon has also hosted the Ally Skills Workshop, which teaches men simple, everyday ways to support women in their workplaces and at events like LinuxCon. Read more

AMD Has More Developers Working On Their Open-Source Driver Behind The Scenes

While there's just a handful of names that Phoronix readers are familiar with when it comes to AMD's open-source Linux driver developers and those from AMD who communicate with the community in our forums, it turns out there are many more developers at AMD becoming involved as part of their new AMDGPU driver stack. Read more