David Yanofsky and Tim Fernholz created an interactive chart showing the weight, national origin and position of more than 1,300 active satellites orbiting the planet Earth. The data was sourced from the Union of Concerned Scientists.
It goes out in bands: there's a cloud in low-earth orbit bulked up with the International Sapce Station and surveillance satellites. Satellite phone networks such as Iridium and Globalstar form conspicuous rings about 800 and 1500 km up. 20km up are the navigation networks GPS and Glonass. 37km up is a mess, with so many geostationary satellites clustered together that they become a rainbow blur in the graphic.
Orcasound is a citizen science project (and app) enabling you to listen to livestreams of audio from underwater microphones off Washington’s San Juan Island.
Today would have been Carl Sagan’s 84th birthday. I wish he were here. Watch the above, climb aboard your Ship of the Imagination, and make the future. View this post on Instagram My dear wonderful dad would be 84 today. I find that very hard to imagine. I spend a lot of time wondering what […]
NASA’s Juno spacecraft took this glamour shot of Jupiter on October 29, 2018, from about 4,400 miles (7,000) kilometers above the planet’s clouds. From NASA: A multitude of magnificent, swirling clouds in Jupiter’s dynamic North North Temperate Belt is captured in this image… Appearing in the scene are several bright-white “pop-up” clouds as well as […]
A picture can be worth a heck of a lot more than just a thousand words. If you’ve squinted for ages trying to get just the right photo, you might have the right passion for a career behind the camera. You might even have the right equipment, but do you have the know-how? The Beginner-To-Expert […]
In case you hadn’t noticed from the sleigh bell-heavy music and the hues on your Starbucks cup, the holiday season hasn’t shown any more patience this year. But that doesn’t need to be a bad thing, especially if you’re hoping to get a jump on your shopping. Retailers aren’t waiting til Black Friday to dish […]
What do you get for the techie who has everything? How about giving them a Raspberry Pi and letting them make pretty much anything. Or better yet, do it for yourself with the Ultimate Raspberry Pi eBook Bundle. This trove of ideas and education unlocks the unlimited potential of this mini-computer, whose affordability and versatility […]