The announcement was made that we detected a gravity wave from a distant object that
had a very big or catastrophic gravity event millions of years ago when the gravity wave
showed up here.
Gravity wave, obviously how hard could it be?
So when I do experiments on light to detect particles we detect particles of light.
When we do experiments on light to detect waves we detect waves of light.
When we look at forces, that's the transmission or the force over a distance is the transmission
of energy, so we can find energy traveling in waves, we can find energy traveling in
packet or particles.
So people have speculated since – well, this is the hundredth anniversary of Einstein
publishing his landmark papers, people have speculated on the nature of gravity.
Now understand we understand gravity with extraordinary precision.
We land spacecraft on Mars precisely.
Everybody watching this has probably used a global positioning system on his or her
phone or in a car or in an airplane that's navigating with global positioning.
Those satellites that enable the system to work rely on both special relativity, which
is the influence of the speed of the spacecraft relative to the airplane or ground, and general
relativity, which is the speed of time as effected by the Earth's gravity.
So people have suspected or speculated that there will be waves of gravity.
And ways of gravity would date back to the big bang, to the origin of the universe 13.7
billion years ago, but they're very weak, extraordinarily weak.
Compare how easy it is to use chemical energy to hold a ball up against the pull of gravity
or just hold yourself upright against the pull of gravity.
Gravity, of the forces of nature, is the weakest one and so if its energy or force or influence
moves at the speed of light, like everything else does, does it move in waves?
Well to detect them you'd need an extraordinarily sensitive instrument, crazy sensitive because
this influence is so weak.
And we did it.
We set up an instrument in Louisiana and in Washington state using these mirrors and as
the gravity wave passed through the earth the mirrors moved, and with extraordinarily
sensitive measurement of the waves of reflected laser light we were able to detect this small
movement, these small movements.
And so what does that mean for us?
Well, I don't know.
But the discovery of relativity lead to global positioning systems and the Internet and our
ability to plant crops with precision and feed 7.3 billion people where we used to only
feed 1.5 billion people.
So who knows where this discovery will lead.
But I wouldn't be surprised if it leads to a new understanding of another aspect of physics
and a new source of energy or we prove to ourselves that there is no other source of
energy and we got to rely on wind or solar or what have you.
Who knows what it will need to.
But the basic research is worth celebrating.
This is a society that uses its intellect and treasure to make discoveries about nature
and ultimately where we all fit in in the cosmos, our place in space.
So if you're a human able to hear this broadcast or watch this broadcast, celebrate it.
Humans have made another discovery about the universe.
It's not bad.