Word: neutrons
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Although supernovae are said to "explode," in reality they start with a collapse, Kirshner points out. The inside of the star collapses to make what is also called a "neutron star" or "black hole" and this heats and eventually blows off the star's outer shells, thus spreading newly created substances throughout the universe...
...exactly. Senior Administration officials close to the negotiations say the capability claimed by the Soviets is based on familiar, not revolutionary technology. The Soviet proposal is to approach suspect vessels by helicopter or ship and bombard them with high-energy neutrons emitted by portable particle accelerators. These neutrons would provoke fission reactions within any nuclear warheads on board and release detectable streams of neutron and gamma-ray emissions. The scheme is feasible, say U.S. experts, but could be foiled by shielding the warheads with thick layers of water and wax. "We looked at that technology very, very carefully a couple...
...1987A's cloud of debris is now generating the light. If he is right, gamma-ray emissions from decaying cobalt 56 should start showing up this summer. Concedes Woosley: "I'm out on a limb." A more radical theory, put forth by Princeton Astrophysicist Jeremiah Ostriker, proposes that the neutron star that formed at 1987A's center when Sanduleak exploded has turned into an extremely rapidly rotating pulsar that is leaking energy and illuminating the surrounding debris...
...since 1985 by the National Science Foundation, is rapidly emerging as a leader in scientific graphics. Last year, for instance, Artist Donna Cox and Computer Scientist Ray Idaszak helped Caltech Astrophysicist Charles Ross Evans produce a short videotape depicting what in theory would occur in the collision of two neutron stars. To the untrained eye, the colliding stars look more like exotic flowers than a cosmic catastrophe. But the colors all have a quantitative meaning: areas colored red are ten times as dense as yellow ones, and yellow represents 100 times the density of blue. "People who are not involved...
...resulting shock waves spread outward through the core, enter the star's still unsuspecting outer layers, and hours later reach the surface, spewing the star's laboriously made elements into space in a mammoth explosion. All that is left behind is the neutron core, the strange entity that astronomers call a neutron star...