Category Archives: Physics

“Some 130 million years ago, when dinosaurs roamed Earth, two dead stars in a far-away galaxy collided violently…”

NRP Science: A New Era For Astronomy Has Begun.

“Astronomy will never be the same again. We will be able to watch extremely violent processes on the fly, and watch them in many different ways, as they run their course. […] That so many astronomers could each catch a piece of the story and then work together to patch it together is a magnificent achievement.

Everytime a new tool or technique made its way into astronomy, amazing new discoveries followed. We are now watching the skies with unprecedented precision and breadth, combining all wavelengths of light with gravitational waves.

If history is a guide, we can expect untold surprises as we dramatically amplify our grasp on physical reality. Stay tuned and enjoy the show.”

When adding a third filter lets through MORE light

3Blue1Brown with minutephysics: Some light quantum mechanics. “This is a simple primer for how the math of quantum mechanics, specifically in the context of polarized light, relates to the math of classical waves, specifically classical electromagnetic waves.”

minutephysics with 3Blue1Brown: Bell’s Theorem: The Quantum Venn Diagram Paradox. “This video is about Bell’s Theorem, one of the most fascinating results in 20th century physics. Even though Albert Einstein (together with collaborators in the EPR Paradox paper) wanted to show that quantum mechanics must be incomplete because it was nonlocal (he didn’t like “spooky action at a distance”), John Bell managed to prove that any local real hidden variable theory would have to satisfy certain simple statistical properties that quantum mechanical experiments (and the theory that describes them) violate. Since then, GHZ and others have managed to extend the theoretical work, and Alain Aspect performed the first Bell test experiment in the late 1980s.”

Raketen zum Selberbauen

Raketfued Rockets ist eine Website von Wasserraketen-Enthusiasten für Wasserraketen-Enthusiasten – und solche, die es werden wollen. Es wird erklärt, wie eine Wasserrakete funktioniert und wie man eine baut. Dafür gibt es eigens die Kategorie Anleitungen mit ebensolchen für Anfänger und Fortgeschrittene, mit PDF-Einkaufslisten und Erklärvideos. In diesem Zusammenhang sei auch die FAQ-Seite erwähnt, auf der Fragen zu Klebstoffen, Timern und verwendeten Materialien beantwortet werden. Außerdem findet man auf der Seite auch Aufnahmen von Wasserraketenstarts. Ach ja, und natürlich haben sie auch einen eigenen YouTube-Kanal.

Vor vielen Jahren habe ich mal eine Jugend-forscht-Arbeit zum Thema Wasserraketen betreut. Damals hätte uns die Website sehr weitergeholfen…

“Gosh, I’ve worked on Cassini for almost an entire Saturn year.”

BBC News: ‘Our Saturn years’. Cassini’s epic journey to the ringed planet, told by the people who helped make it happen. By Paul Rincon.

““The Voyagers gave us a really wonderful impression of Saturn. It’s a beautiful gas giant,“ says Nasa’s director of planetary science Jim Green.

Prof Andrew Coates, from the Mullard Space Science Laboratory in Surrey, UK, agrees:

“Saturn is the most spectacular planet in our Solar System. The incredible rings, visible even in binoculars or a small telescope, make it stand out compared to all the rest.“

In places, the rings are only about as tall as a telephone pole. Yet from end-to-end they are more than 20-times as wide as the Earth. “

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