From the outside, galaxies appear as a mass of stars orbiting a dense center. But inside, they are more complex, with some groups of stars moving at different speeds or directions, in part because they originated from separate galaxies that collided billions of years ago. To untangle these disparate components of the Milky Way, the European Space Agency plans to launch Gaia in October.
Our friends over at Flying have a great slideshow up walking us through the 50 greatest innovations in navigation of all time. It's really fun to see how primitive but effective navigation used to be--celestial navigation and bonfires are on the list--and how far we've come, using microwaves and satellites and autopilot and man, so much other cool stuff. Read the article over at Flying.
When disaster strikes and danger looms, the heroes that burst onto the scene to save the day might not even be human.
by Douglas Main
Posted 04.08.2013 at 8:14 am
It’s hard to comprehend the bravery required for a person to run into a burning building rather than flee from it. But in the near future, first responders to harrowing disasters and emergency situations aren’t likely to even know what bravery is. Instead, they’ll be emotionless robots that only exist to accomplish the task at hand, helping police, firefighters and homeland security personnel do an even better job of protecting people and saving lives.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.