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We live in what we call the solar system. Beyond the solar system is what we call interstellar space. What is the boundary? How do we know when we’ve crossed from the solar system to interstellar space? What is the shape of the solar system? There is now a paper that tries to answer all of those questions. They’ve got math and graphics. Here’s more from Centauri Dreams:
Between the Solar System and interstellar space is a boundary layer called the heliosheath. Or maybe I should define this boundary as being between the inner, planetary part of the Solar System and interstellar space. After all, we consider the Oort Cloud as part of our own system, yet it begins much further out. Both Voyagers have crossed the region where the Sun’s heliosphere ends and interstellar space begins, while they won’t reach the Oort, by some estimates, for another 300 years.
The broader region is called the heliopause, a place where the outflowing solar wind of protons, electrons and alpha particles (two protons and two neutrons tightly bound) encounters what we can call the interstellar wind, itself pushing up against the heliosphere and confining the solar wind-dominated region to a bubble. We now learn that this boundary region has been mapped, showing interactions at the interface.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Python for Microcontrollers — Python on Microcontrollers Newsletter: ESP32 Web Workflow for CircuitPython, CircuitPython Day 2022 and more! #CircuitPython @micropython @ThePSF @Raspberry_Pi
