A total of 1,715 stars within a range of 326 light-years have been in the right place to spot life on Earth, either currently or sometime around the wee ages of human civilization roughly 5,000 years ago, astronomers from Cornell University and the American Museum of Natural History wrote in a paper published in Nature Astronomy on Wednesday. The paper, relying on a recently released trove of data on distant stars detected by the European Space Agency’s Gaia spacecraft, indicates 1,402 of those systems can currently see Earth from a finite perspective called the Earth Transit Zone (ETZ).
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.