Astronomers Find Closest Black Hole Yet in ‘Nearby’ Star System #SpaceSaturday

It turns out black holes are closer to the Earth than astronomers thought. In the constellation Telescopium, about 1,000 light years away, they’ve found a stellar mass black hole. Here’s more from Astronomy Now:

“We were totally surprised when we realised that this is the first stellar system with a black hole that can be seen with the unaided eye,” said Petr Hadrava, emeritus scientist at the Academy of Sciences of the Czech Republic in Prague and co-author of a study in the journal Astronomy & Astrophysics.

The star system, known as HR 6819, was observed as part of a study of binary star systems. Using the FEROS spectrograph with the European Southern Observatory’s MPG/ESO 2.2-metre telescope at the La Silla Observatory in Chile, researchers were surprised to find one of the visible stars, one with at least five times the mass of the sun, was orbiting an unseen body every 40 days. The second visible star is at a larger distance from the inner pair.

See more!


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.

Join 27,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

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.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — To make it through a tough business cycle, layoffs should be a last resort

Wearables — Frame it with PVC

Electronics — Tristates!

Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython available for 200 boards, MicroPython release and more! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — ESP Earrings, RP2040 WiFi, and more!

Microsoft MakeCode — Mechanical Coin Bank

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week — 4pm Eastern TODAY! 4/20/21 @adafruit @johnedgarpark #adafruit #newproductpick

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.