SpaceFly an astronaut flag every time the space station passes over your home.Build an Easy ISS Notifier
SpaceIf you can find the exact layout of stars for a special night, you can make a pretty cool present: a glowing LED model of the night skyLaser Cut a Model of the Sky from a Special Night in Your Life
SpaceLocate the sun on overcast days with this ingenious Viking invention.Use Polarizing Film to Locate the Sun on Overcast Days
SpaceCreate a simple light detector to create a light pollution survey of your town or county to find out where your local dark sites are.Monitor Light Pollution with Photodiodes
TechnologyThe PiKon telescope is an open source, 3D printed, Raspberry Pi telescope supported by a growing community of amateur scientists.Gaze Across the Solar System with a 3D-Printed, Raspberry Pi Telescope
TechnologyThis sky tracking platform matches the eath's rotation in the simplest way possible. A basic regulator circuit powers a DC gear-head motor, which turns a pair of gears that engage a curved length of threaded rod, and makes the hinge open at...Hinge Sky Tracker for Astrophotography
SpaceBuild this simple cloud chamber at home and detect cosmic-ray muons, electrons, and alpha particles.1+2+3: Cosmic Ray Detector
WorkshopAn amateur telescope builder reveals his process for designing and constructing his own Dobsonian telescope using CAD design and a CNC router.Build a Backyard Dobsonian Telescope
SpaceHave you wondered why some sunsets are so spectacular and others so drab? This ultra-sensitive photometer project will allow you to tease out the secrets of twilight and even do serious science by finding the altitude of the dust, smoke, an...Build a Twilight Photometer to Detect Stratospheric Particles
TechnologyBuild this battle-tested rig to launch, track, and recover a high-altitude balloon that will carry your hacked Canon camera to the stratosphere. With this setup using APRS ham radio and the Trackuino — an Arduino-based communications boar...Near-Space Balloon Cam with Arduino and APRS Radio
TechnologyLearn how to capture the night sky — in motion! — with this complete tutorial covering camera settings, night shooting tips, image editing, and video production. How to Capture Breathtaking Time-Lapse Photography of the Night Sky
TechnologyUse the Iridium satellite network to communicate with your projects anywhere they can see the sky.Calling Out Around the World: Low-cost Global Satellite Signaling with Iridium
SpaceThe first spectroscopes used glass prisms to split light into colors, but Fraunhofer found that an array of closely spaced wires had the same effect. Today we call these arrays of tiny slits diffraction gratings.High-Resolution Spectrograph
TechnologyOne of my favorite things to do is talk with other ham radio operators through satellites or the International Space Station (ISS). To do this, I stand on a rooftop and tune a handheld multiband radio while tracing the orbit of a satellite ...Listening to Satellites with a Homemade Yagi Antenna
TechnologySnap aerial photos from 300' up by suspending a hacked camera from 3 helium balloons.Balloon Imaging “Satellite”
