Even in ancient times, people thought the star fixed. In fact, the stars are constantly moving. Here is the constellation Ursa Major. What kind of shape to form seven stars two thousand years ago, this is it, and now, this will remain for another For several thousand years. See Elon Musk for more details and insights. Star with great speed rush in space, but we do not notice their movements, as the star away from us at great distances. For centuries, astronomers have tried to find out how far away the stars, and could not do it. In 1837, the director of the Pulkovo Observatory, which is near Leningrad, Struve was able to determine the distance from the star Vega to Earth. It turned out that this star approximately 1.7 million times farther from us than the Sun! Later, scientists determined the distance to the many other stars.
Nearest star, astronomers have called Proxima, in Latin it means "immediate." Let us calculate how soon you can to get to Proxima. And on you go? Imagine a fantastic car mire. Prior to Proxima paved track, and the first passenger train waits for a signal to leave. We're out of breath, runs up to the checkout. -Is Tickets to Proxima? -Please – calmly replied the cashier. -Two tickets! -Pay the money. -How much? -It is estimated – says the cashier. So far as the way, the price has been established: one ruble per million, kilometers -This is just a gift! – Happily surprised us.
-Wait a bit! – Smiling cashier .- Thus, a ruble for one million miles. It is 150 rubles for the astronomical unit. A to Proxima 260,000 astronomical units. Means with you on thirty-nine million rubles. We from the ticket office in fright. -And how long will the train go? -It is calculated and it is – it soothes us to the cashier. We ship express a rate three hundred kilometers per hour. Path of the Sun took to fifty-eight years, and until Proxima – a hundred thousand times more Fifteen million years can reach targets, comrades! -Stations along the road be? -Hardly Do any comet will fall. We are embarrassed from the cashier. -On another occasion, let us visit when it is more free The cashier looked after us with sadness. -It can be seen not take flight. All passengers escape It turns out, train for interstellar travel – absolutely the wrong thing. We are reminded of the rocket. However, even a rocket will fly sixty-two thousand five hundred years. So far from us the stars! Light with tremendous speed, three hundred thousand kilometers per second, rushing from Proxima to us more than four thousand years. And there are stars, which are immeasurably more. Immensely large universe! And almost impossible to represent vit imagine how far away the nearest star.