First observation of merger of two neutron stars

Neutron stars are the remnants of explosions of supernovae. Neutron stars are most dense in the universe so these are quite small in size. For example the size of London. They are so dense that a spoonful of neutrons weighs as much as 100 000 Eiffel towers.

It so happens that when two neutron stars approach each other, they turn faster and faster generating the gravitational waves by modifying the space-time around them. Ultimately they collide and fuse. After this the eject lots of matter.

How such events in occuring in the universe are detected? Electromagnetic rays emitted during such an event in the form of visible and invisible energy waves can be tracked by the modern telescopes and spectrometry.

Another technique has been added and it measures the gravitational waves which are generated in such violent events involving massive bodies. Such instruments has been installed in US. Called LIGO (Laser interferometer Gravitational-Wave Observatory) can record the gravitational waves.

One such event of fusion of two neutron stars happened 130 million years ago. The gravitational ripples were detected by LIGO on August 17 at 1241 GMT for 100 seconds. Then after 2 seconds a Gamma rays burst was observed. After hours and days following the event, X-rays, UV rays and infrared rays were detected.

This is the first successful observation of fusion of two neutron stars through Gravitational Waves and as well as through different kind of rays that are emitted.

It also confirmed the premise that gravitational waves travel with speed equal to that of light. This event was made possible with the collaboration of 3674 scientists from 953 institutions all around the world.



Story of two charged dots

Once upon a time many years ago, there were two charged particles. They came to existence within a short span of time to one another. How do we trace their journeys in the time? Well scientists use cloud chamber to trace their paths in the space with time. This is a writer’s device so it can be extraordinary and perfect.
From their trajectories it is clear that they had opposite charges but very far apart in the beginning. But their traces were of opposite slope and thus they were heading to a collision in future. Force of attraction also began playing its part in bringing them closer and closer.
Eventually they met and neutralised their charge and became an atom. Although being one but had their independent existences also. The resultant product was stable for many years.
Then under the influence of external forces and due to a sense of ennui, the atom began to become unstable. It began to expand. Both charges began distancing from each other. Like the universe which is expanding continuously, the charged dots started loosing communication with each other and becoming more and more independent identities again as they were in the beginning. Soon they will be out of the view of cloud chamber screen. The scientist shall have to zoom out the screen to see them both moving away from one another and losing out the finer details in the process. Story will come to an end.