As the name implies, the observable universe is everything that humans can see from Earth with our increasingly sophisticated observatories. As our astronomical vision has improved over the centuries, we’ve discovered that gazing into space is also a form of time travel to the past. If you look at a star like Sirius, which is eight light years away, you are seeing an image of it eight years ago, when the starlight hitting your eye left it. The farther away an object in space is, the more distant in time it is as well, and so the light from stars that died long before our planet was born continues to reach Earth.
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.