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Updated: June 24, 2025
At this incredibly remote distance lies the main part of the cluster from us; but it is more marvellous still that we have every reason to believe that the outlying stars of this cluster are as far from the central ones as the nearest star we know of, Alpha Centauri, is from us!
Taking a mean between his own and Pouillet's, he calculated that the ordinary expenditure of the sun per minute would have power to melt a cylinder of ice 184 feet in diameter, reaching from his surface to that of Alpha Centauri; or, putting it otherwise, that an ice-rod 45·3 miles across, continually darted into the sun with the velocity of light, would scarcely consume, in dissolving, the thermal supplies now poured abroad into space.
It requires four and one-quarter years for a beam of light to travel from this star to earth at the rate of 186,000 miles a second, thus showing that Alpha Centauri is about two hundred and seventy-five thousand times as far from us as is the sun, in other words, more than 25,575,000,000,000 miles, which, expressed in our notation, reads twenty-five trillion, five hundred and seventy- five billion miles, a number which the mind of man is incapable of grasping.
"O.K. with me," said Loring. "Take this wagon up toward Alpha Centauri a little way. Coming out of the sun, they won't see us. We'll use one of the jet boats to deliver our little present. I'll set the fuse, put the jet boat on automatic, and aim it right for the Polaris." "All right," agreed Manning reluctantly.
Nobody can pretend to be profoundly immersed in the internal affairs of Sirius or of Alpha Centauri. A fiery revolution in the belt of Orion would affect us less than a passing finger-ache in a certain single terrestrial baby of our own household.
There are grounds for thinking that the southern heavens contain noteworthy objects which, on the whole, are nearer to the solar system than are the noteworthy objects in the northern skies. The nearest star whose distance is known, Alpha Centauri, lies in the southern hemisphere, and so also does the most splendid cluster of stars.
"That thing can penetrate other star systems in our galaxy. And that's a long way off!" "Nearest thing to us is Alpha Centauri in our own galaxy, and that's twenty-three and a half million million miles away," commented Astro. "That's not so far," argued Tom. "Only a few months ago the Solar Alliance sent out a scientific exploration to take a look at that baby."
Making adjustment for degree of slip on each successive rocket cutout, find present position by using cross-fix with Regulus as your starboard fix, Alpha Centauri as your port fix." Suddenly a bell began to ring in front of Roger. Without hesitation he adjusted a dial that brought the radar scanner into focus.
He knew if he thought about Briscoe, he'd start bawling like a baby, so he swallowed hard a couple of times, set his chin, and concentrated on the trip to Procyon Alpha. That meant this ship was outbound on the Aldebaran run Proxima Centauri, Sirius, Pollux, Procyon, Capella and Aldebaran. The line of passengers was disappearing through a doorway.
Every wise man will admit that the possibilities of nature are infinite, and include centaurs; but he will not the less feel it his duty to hold fast, for the present, by the dictum of Lucretius, "Nam certe ex vivo Centauri non fit imago," and to cast the entire burthen of proof, that centaurs exist, on the shoulders of those who ask him to believe the statement.
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