Astronauts on board the International Space Station (ISS) were busy the last week of January using amateur radio to make contact with two schools.

The Amateur Radio on the International Space Station (ARISS) program arranged contacts with Brentwood Magnet Elementary School in Raleigh, North Carolina, and Norwich Free Academy (NFA) located in Norwich, Connecticut.

On 26th January 2023, nearly 400 students at Brentwood Magnet Elementary School filled the gymnasium to listen to astronaut Koichi Wakata answer questions about his experience on the ISS. Wakata told students he loves being in space but is looking forward to taking a shower when he returns in March.

Surface mount components have been a game changer for the electronics hobbyist, but doing reflow soldering right requires some way to evenly heat the board. You might need to buy a commercial reflow oven — you can cobble one together from an old toaster oven, after all — but you still need something, because it’s not like a PCB is going to solder itself. Right?

Wrong. At least if you’re [Carl Bugeja], who came up with a clever way to make his PCBs self-soldering. The idea is to use one of the internal layers on a four-layer PCB, which would normally be devoted to a ground plane, as a built-in heating element. Rather than a broad, continuous layer of copper, [Carl] made a long, twisting trace covering the entire area of the PCB. Routing the trace around vias was a bit tricky, but in the end he managed a single trace with a resistance of about 3 ohms.

Scientists have captured a faint radio signal from the most distant galaxy yet - a signal they believe created a chance to look back 8.8 billion years in time when the universe was 4.9 billion years old.

Arnab Chakraborty, a post-doctoral researcher at McGill University, said the signal was received at a "record-breaking distance."

A news release from McGill university said the signal, which was received by the Giant Metrewave Radio Telescope in India, had a wavelength called the 21 cm line.