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Space

Galaxies Twice As Bright As Previously Thought 139

Posted by Soulskill
from the intergalactic-dust-buster dept.
Astronomers led by Simon Driver of Scotland's University of St. Andrews have discovered that interstellar dust shades us from as much as 50% of the light emitted by stars and galaxies. The scientists compared the number of galaxies we could see "edge-on" against the number which were "facing us," reasoning that dust would obscure more of the former, since we already receive less light from them. SPACE.com notes, "In fact, the researchers counted about 70 percent fewer edge-on galaxies than face-on galaxies." A NYTimes report provides some additional details: "Interstellar dust absorbs the visible light emitted by stars and then re-radiates it as infrared, or heat, radiation. But when astronomers measured this heat glow from distant galaxies, the dust appeared to be putting out more energy than the stars. 'You can't get more energy out than you put in, so we knew something was very wrong,' said Dr. Driver. The results also mean that there is about 20 percent more mass in stars than previously thought."
Medicine

Surgical Robot Removes Calgary Woman's Brain Tumor 107

Posted by timothy
from the and-yes-it-had-permission-to-do-so dept.
Raver32 points out an article in the Victoria Times Colonist about an interesting advance in robotic surgery: "Calgary doctors have made surgical history, using a robot to remove a brain tumor from a 21-year-old woman. Doctors used remote controls and an imaging screen, similar to a video game, to guide the two-armed robot through Paige Nickason's brain during the nine-hour surgery Monday. Surgical instruments acting as the hands of the robot — called NeuroArm — provided surgeons with the tools needed to successfully remove the egg-shaped tumor."

If the facts don't fit the theory, change the facts. -- Albert Einstein

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