Discovered gravitational waves. Because it opens a new era? – La Gazzetta dello Sport

The day will come when this section will describe what happened 10 to the minus 43 seconds after the Big Bang …

In just 4,500 lines?
Alas yes, the Director will grant us no room even at that time.

we are hardly noticed, the asylum?
No. It is that scientists have just announced, at a press conference that has been held simultaneously in Cascina (Pisa) and the United States, that gravitational waves do exist, as Einstein had predicted. And at the Big Bang (roughly 13 billion years ago), the immense explosion tore precisely gravitational waves of which around the world is still no trace. They are very weak and not only because from long ago. It is that gravitational waves are very weak on their own, weaker product disturbance from the engine of a car and picking them up you have to build the usual kilometer long tunnel and then shoot laser beams into the tubes and if the laser beams instead of behaving like they should, at some point deform in a certain way (warping, mind you, equal to one billionth of 10 to -19 meters), then here, we can say: it went on a gravitational wave. Well, it really happened. The deformation occurred, the gravitational wave exists, the black hole (always assumed and seen) as well, Stephen Hawking, heard about this, he said: we have a new way to observe the universe.

Meanwhile, she must tell me what does all this less, 10 to less than 19 meters and, at first, 10 to the minus 43 seconds …
If you write a number like this: 2 ² reads two squared, and it means 2 x 2, ie four. If I write 10 ² means 10 x 10, that is, 100. If I write 10 ⁴³ I mean, in very abbreviated form, I’ll have to multiply 10 by itself 43 times, that is, 1 followed by 43 zeros, that is too long to type. If I write, finally, 10 “at least 43″ simply means that the number 10 is put into a fraction as follows: 1/1043. That is, it is a very small number, a 1 split another one followed by 43 zeros …

Why first spoke of blacks holes? What are the blacks holes? What have the blacks holes?
Unfortunately we did the brain in a certain way, a way that makes us understand and immediately the three dimensions, namely, length, width and depth. While we can not see the existence of a fourth dimension, which is time. Physicists instead, thanks to the equations, beyond the limits of human sensitivity and describe not space, but the space-time fabric observable for them from the outside and that deform events. Even the beating of the keys of my computer right now changing space-time. Let alone when you collide two blacks holes … The blacks holes are places in space-time where the force of gravity is so powerful that nothing that is done inside can get out more. Two of these blacks holes collided (rotate as planets) and their clash has generated waves, which are called “gravitational” because they are the waves of the same force that makes objects fall down … Yeah, she seems natural that the objects from falling down. And how else they could fall ?, she says (I can see it in your eyes). But in many Shuttle things and the bodies they do not fall down, but float in space and on the Moon is pulling footballs far away with a little push on the Shuttle or the moon because gravity is weak. Gravity is the force that is possessed by every body that attracts towards you, like a magnet, the surrounding objects. Let’s say that the objects on Earth fall down because there is a magnet in the center of the Earth, which attracts them. The same kind of force is generated when events occur enormously catastrophic, as the initial Big Bang, or the collision of two blacks holes that eventually merge, as is the case now.

How they remember and why the discovery is also Italian?
in the countryside of Pisa, that is in Cascina and the United States have built the LIGO and Virgo interferometers, ie 3 km of tunnels in the Italian site and 4 in the two American sites. It is here that are shooting the laser beams and which are observed deformations possibly caused by gravitational waves, generated in turn by some catastrophic event. Virgo, in particular, was born in the mid 80′s, it cost € 78 million and employs about 250 researchers from 19 laboratories in 5 countries. For now we could / should be able to pick up the waves emitted 380,000 years after the Big Bang. But the interferometers will be increased, will only be built directly in space and one day, perhaps, we will know what happened ten thousandth …. (43 zeros) second after the Big explosion. The beginning of a story that in the end, think a bit ‘, led to my birth and to her.