David Schneider built his own flashing roof telescope, blank paint thinner, free software-defined radio application, USB receiver, and coaxial cable length. The whole project cost him less than $ 150, and he's already using it to detect galactic hydrogen and monitor the motion of the spiral arms of our Milky Way galaxy. (Using a radio telescope, you search for and measure radio frequency radiation emitted by astronomical objects.) From the IEEE spectrum:
Point to Cygnus and you will get a strong signal from the local Milky Way arm very close to the expected 1420.4-MHz frequency. Point it at Cassiopeia of greater galactic length and you will see the hydrogen line signal shift to 1420.5 MHz – a fine Doppler change indicating that the material emitting these radio waves is moving toward us in a relative sense. With some hunting you may be able to distinguish two or more different signals with different frequencies coming from different spiral arms of the Milky Way.
Don't expect to hear E.T., but if you manage to map the Milky Way that way, it looks strangely empowering. They will be well spent $ 150.
People at JSTOR Daily discovered the 1953 colloquium process, which raised a big question: Early on, humanity first grew grain not for the purpose of making bread – but for brewing beer? Or, as the official title of the event asked, "Has anyone ever lived with beer alone?" If the latter is true, […]
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Some "fancy" brand bags are made of polyethylene or nylon and we throw microplastics in hot drinks. Delicious! Nobody knows if this is bad for you. Natalie Tuffenki, a professor of chemical engineering at the University of Montreal, was surprised to find one such bag in the tea she ordered from a coffee shop one morning. […]
Shipworms are a threat that engulfs trees in ships and docks. For some time, as the New York Times explains, pollution in the port of New York actually had some benefit in combating them: By the 1960s, water was being flooded with crude sewage and oil and chemicals discharged from factories. "Industries use […]
A few hours of music, an easy way to make calls while traveling. We don't want a lot of our headsets – but looking at the specifications of the Aunu Audio M50 True wireless headphones, maybe we should. These things will not only outlive traveling abroad, but also make them […]
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You are already picking up your games and movies on the go. Why not share them? With the PIQO Powerful 1080p Mini Projector, you can have this public, movie-driven experience anywhere on your own massive screen. This widget packs a lot of functionality into a roughly 2 ″ square pack. First and foremost, there are […]
Want to create your own website? Even for a modest personal site, it was once assumed that you could wait days or weeks for a web designer to hammer in secret codes on your behalf. That sounds a little ridiculous today. And if you have to thank a company for this, it will probably be […]