How to pronounce “centauri” in English

pair of binoculars to see it. It's called Proximus Centauri, and it is just a hair closer to us than the two starsof Alpha Centauri. Anyways, in 2016, it was announced a group of astronomersfound an exoplanet with the Doppler method around Proxima Centauri, our nearest neighbor in the galaxy.

It's a chip with a parachute, inflated by a bank of laser beams, which would accelerate it to 20% the speed of light.And it would reach Alpha Centauri in 20 years.And so we are talking about the first microchip starship to take us to the heavens.

for planets. So let's imagine for a moment we could transport ourselves to one of these, not the TRAPPIST ones, but some planets orbiting a slightly bigger star.But other stars like Proxima Centauri b, it's flaring like dozens of times a day, basically.

And so this is a wonderful branch of mathematics which sort of reveals the richness and power of the subject.Maybe we'd actually get to Alpha Centauri.

of Alpha Centauri. Anyways, in 2016, it was announced a group of astronomersfound an exoplanet with the Doppler method around Proxima Centauri, our nearest neighbor in the galaxy.And what was even more exciting is this new planet which has been called without that much creativity Proxima B. The new

It's massless. And that's essential to make electromagnetism a long-range force.The electron here repels an electron in Alpha Centauri.-- OK-- or anywhere in another galaxy.And the reason is, because the photon is massless, it can carry an arbitrarily small amount of energy.

Faster speed comes with stronger propelling, which is enabled by injecting more fuels per unit time to boost.We computed how much energy it would require to travel to Alpha Centauri in 1,000 or 10,000 years and we need to inject the entire solar system per second.Pretty much you have to use all the solar system you pass by as the source of energy. Also we need materials that can endure such a high speed.

really don't. We know a lot about it, but really understanding it, not so much. But Newton thought that time was just universal for everyone, so my time, yourtime, some person's time on Mars or on Alpha Centauri, everybody experienced time the same. What Einstein showed was that that wasn't the case, that different people moving atdifferent speeds with respect to one another experience time differently, which is absolutely a mind-blowing concept. Now, most people think that Einstein then said, well, he invented spacetime, that,

How far away is that?Four and a half light years. And if you take a look at the Alpha Centauri system, the closest system to the Earth,you have uh red red stars that could could have life on them. We're not sure.

view like this one. So, this is the famous southern cross. We have the constellation of Centurus that kind ofsurrounds it. And over here is a very famous pair of stars actually called Alpha Centauri that are often said to bethe closest stars to the sun. Actually, that's not exactly right. There is a

much less conspicuous star over here, a little red star that you actually can't see by eye. You need at least a goodpair of binoculars to see it. It's called Proximus Centauri, and it is just a hair closer to us than the two starsof Alpha Centauri. Anyways, in 2016, it was announced a group of astronomers

But one light year is equal to about six trillion miles.That's really far. And the next closest star to our solar system is Proxima Centauri, and it is 4.3 light years away.And in miles, that's about 25 trillion miles.

Give me one example.Well, uh, for example, take a look at Alpha Centauri, the closest star system to the planet Earth, right?How far away is that?

And that's about 10 trillion miles.The closest planet that is potentially habitable and that it orbits its star at a region where it could have that climate is Proxima Centauri b, orbitingthe closest star to us.

the news, it was probably accompanied by this dramatic image right from theplanet's surface, right? We see these mountains. Uh we see Proxima Centauri in the distance. You can even see the twostars of Alpha Centuri further away.

for planets. So let's imagine for a moment we could transport ourselves to one of these, not the TRAPPIST ones, but some planets orbiting a slightly bigger star.And I just listed three, for those who would read the news or notice that last summer there was one announced around Proxima Centauri b, that's our very

the Heisenberg uncertainty principle.And if it can exist for an arbitrary long time, it can travel from here to Alpha Centauri before it's absorbed.So the fact that electromagnetism is a long-range force is uniquely related to the fact that the photon is massless, in this picture.

male #1: Professor Dawkins, thank you very much for coming and I'm a great admirer of your work and as yourself a proud atheist.And then the nearest other star, which is still pretty near, Proxima Centauri, is two thousand miles away.

you could actually there was a paper that was put out recently.You can have leaves that are photosynthesized, that are photosynthetic and are totally black which I thought was a lot of fun. One last step back. Alpha Centauri, this is the neareststar system that has planets. It's 4.2 light years away which by the comparison of a lot of the other stuff seems like it's not much. But since the whole idea of wormholes and

planet's surface, right? We see these mountains. Uh we see Proxima Centauri in the distance. You can even see the twostars of Alpha Centuri further away.There seems to be some kind of mist rising from the valley. Of course, this is a complete fantasy. We have no idea