Celia Bella

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Pictures of the Week 12.4.14

The giant black hole at the center of the Milky Way may be producing mysterious particles called neutrinos. If confirmed, this would be the first time that scientists have traced neutrinos back to a black hole. The evidence for this came from three NASA satellites that observe in X-ray light: the Chandra X-ray Observatory, the Swift gamma-ray mission, and the Nuclear Spectroscopic Telescope Array (NuSTAR). Neutrinos are tiny particles that carry no charge and interact very weakly with electrons and protons. Unlike light or charged particles, neutrinos can emerge from deep within their cosmic sources and travel across the universe without being absorbed by intervening matter or, in the case of charged particles, deflected by magnetic fields. The Earth is constantly bombarded with neutrinos from the sun. However, neutrinos from beyond the solar system can be millions or billions of times more energetic. Scientists have long been searching for the origin of ultra-high energy and very high-energy neutrinos. Image Credit: NASA/CXC/Univ. of Wisconsin/Y.Bai. et al.

Portrait of NGC 281. Look through the cosmic cloud cataloged as NGC 281 and you might miss the stars of open cluster IC 1590. But, formed within the nebula, that cluster's young, massive stars ultimately power the pervasive nebular glow. The eye-catching shapes looming in this portrait of NGC 281 are sculpted columns and dense dust globules seen in silhouette, eroded by intense, energetic winds and radiation from the hot cluster stars. If they survive long enough, the dusty structures could also be sites of future star formation. Playfully called the Pacman Nebula because of its overall shape, NGC 281 is about 10,000 light-years away in the constellation Cassiopeia. This sharp composite image was made through narrow-band filters, combining emission from the nebula's hydrogen, sulfur, and oxygen atoms in green, red, and blue hues. It spans over 80 light-years at the estimated distance of NGC 281. (Image Credit & Copyright: Martin Pugh)

That’s No Moon …

<i>Like the spilled contents of some cosmic bag of marbles, it’s amazing to behold the colors and varieties of the planets in our solar system and the</i> …

Want to save your favorite film? Here’s how to fix a scratched DVD or CD

So you let your buddy borrow your DVD of <i>Guardians of the Galaxy Vol. 2</i> and now it’s scratched — guess they didn’t show Chris Pratt’s epic film the …

Doctors unsure why only certain Ebola patients bleed

One of Ebola's most notorious symptoms is bleeding from places like the nose and mouth, but such bleeding has only occurred in a minority of cases in the current outbreak.<p>It remains a mystery why some people experience this bleeding while others don't. The bleeding, which is properly called …