Space porn: These images are (quite literally) out of this world
Now you see it…
The invisibility cloak Harry Potter brandishes against dark lords and nosy professors is now a reality-at least in microwave light. Duke University engineer Yaroslav Urzhumov has designed a plastic disk that makes a small object placed in its hollow center invisible to frequencies from 9.7 to 10.1 GHz (close to the range used by radar speed guns). Holes in the doughnut-shaped cloak can eliminate an object’s shadow and decrease its ability to scatter light. In effect, the cloak guides the microwave beams around the object so they can’t bounce back-rendering it invisible. Until scientists can scale up, however, it might be useful only for getting toy cars out of a speeding ticket.
Time: 3 to 8 hours
Cost: About $100
Difficulty: 1 out of 5
1. Find a 3-D printer, preferably one that builds objects in thin layers of plastic (a process called fused deposition modeling). If you don’t own a 3-D printer, can’t borrow one, or lack the funds to buy one-typically $500 or more-you can pay an online company (such as Shapeways or RedEye on Demand) to print a design for you.
2. Download Urzhumov’s design file at here and print it out. (The default thickness is 1 centimeter, but it can expand as tall as a 3-D printer allows.)
3. To use the invisibility cloak, line the disk’s inner ring with aluminum foil, lay it on a flat surface, and put an object 5.4 inches long or less inside. Any microwaves shining on the disk’s outer edge won’t reveal your precious property.
Before accessing Urzhumov’s 3-D-printing file, please note: Urzhumov and his colleagues retain the copyright to the work, and by downloading this file you agree: 1) to take full responsibility for the consequences of using it; and 2) to indemnify Duke university and all individuals involved in the creation of this work of art-as well as Popular Science and its parent company, Bonnier Corp.-from any and all claims of damage against them. (That said, you can download the file here.)
This article originally appeared in the September 2013 issue of Popular Science.
NASA astronaut Mike Hopkins
On December 28, 2013, Expedition 38 crew member Mike Hopkins participating in the second of two space walks to replace a degraded pump module on the International Space Station. (NASA astronaut Rick Mastracchio is reflected in his helmet!)
The Soyuz TMA-10M
The Soyuz TMA-10M headed towards the International Space Station with crew members from Expedition 37 onboard.
40 years ago the Apollo 8 mission flew up to the moon, orbited it ten times and then returned to Earth. This picture was taken from that flight and shows the Earth as it seemingly rises in similar fashion to a sunrise.
Sunrise from Expedition 36
NASA Flight Engineer Karen L. Nyberg of Expedition 36 took this photo of the sun rising -- a sight they saw nearly 16 times per day due to the speed of the International Space Station's orbit around the earth.
A pair of NanoRacks CubeSats -- nanosattelite spacecrafts carrying experiments -- were launched by Expedition 38.