SCIENCE IN THE NEWS DAILY
Tight Arms Linked to Bigger Black Holes in Galaxies
from National Geographic News
Images from the Hubble Space Telescope have revealed an important relationship between supermassive black holes and spiral galaxies: The more massive the black hole, the tighter the host galaxy's arms.
"This means that to determine the mass of a supermassive black hole, you only need an image of a galaxy," said Marc Seigar of the University of Arkansas at Little Rock.
Within the past decade astronomers have determined that almost every galaxy has a black hole lurking at its center that can range from ten thousand times to a billion times the mass of the sun.
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PODCAST & VIDEO: 3D Printing Replacement Body Parts
Regenerative medicine, a fledgling field with the aim of regrowing parts from a person’s own cells, is being amplified with 3D-printing technology, which can now use organic materials to create scaffolds that cells need to grow into their final forms. Richard Wysk, a professor of industrial and systems engineering at North Carolina State University, discusses the latest successes with this research, and the timeline for creating more complicated structures.
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