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Cosmic bling: When two dead stars collide, gold is created.

September 17, 2013

The announcement was short. It lasted only a fraction of second — a blink of an eye. But a spacecraft in Earth’s orbit, keeping an eye on such events, captured it on June 3 this year. The announcement may have been brief, but it told us that two exotic dead stars, called neutron stars, have collided with each other. This is a relatively rare event, but it bears good news for the merchants in the Sona bazaar. This collision has created gold — lots of it.

But before you head over to Sona bazaar, you should know that this particular collision happened in a galaxy so far away that it has taken light — traveling at a stupendous speed of 186,000 miles every second — four billion years to reach us! In astronomical terms, this collision happened in a galaxy four billion light-years away. In comparison, light from our Sun gets to us in 8 minutes, and is therefore only 8 light-minutes away. The distance of billions of light-years doesn’t intimidate astronomers, as they routinely study events and objects that are even farther away than this particular galaxy. The significance of this event, however, resides in the fact that for the first time, astronomers have been able to study light from collisions that may help us understand the way elements like gold are created in the universe.

Before we get too caught up in the cosmic glamour, we should remember that almost all of the elements that make our bodies were cooked up inside the stars: the carbon in our DNA, oxygen in our lungs, and iron in our blood. Hydrogen in the water molecule, on the other hand, is a leftover from processes in the early history of the universe. The classic quote from the late astronomer Carl Sagan is indeed true: “We are made up of star stuff”.

Excerpt from an article written by Salman Hameed at the IHT. Continue THERE

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