I was reminded of a great start of a sci-fi novel: “The star vanished from the centre of the telescope’s image in less time than a single human heartbeat. Ther

I was reminded of a great start of a sci-fi novel: “The star vanished from the centre of the telescope’s image in less time than a single human heartbeat. There was no mistake, Dudley Bose was looking right at it when it happened. He blinked in surprise, drawing back from the eyepiece. “That’s not right,” he muttered. He shivered slightly in reaction to the cold air around him, slapping gloved hands against his arms. His wife, Wendy, had insisted he wrap up well against the night, and he’d dutifully left the house in a thick woollen coat and sturdy hiking trousers. But as always when the sun fell below Gralmond’s horizon, any warmth contained in the planet’s thinner-than-average atmosphere evaporated away almost immediately. With the telescope housing open to the elements at two o’clock in the morning, the temperature had dropped enough to turn his every breath into a streamer of grey mist. Dudley shook the fatigue from his head, and leaned back in to the eyepiece. The star field pattern was the same, there had been no slippage in the telescope’s alignment, but Dyson Alpha was still missing. “It couldn’t be that fast,” he said. He’d been observing the Dyson Pair for fourteen months now, searching for the first clues of the envelopment which would so dramatically change the emission spectrum. So far there had been no change to the tiny yellow speck of light one thousand two hundred and forty light-years away from Gralmond which was Dyson Alpha. He’d known there would be a change; it was the astronomy department at Oxford University back on Earth that had first noticed the anomaly during a routine sky scan back in 2170, two hundred and ten years ago. Since the previous scan twenty years earlier, two stars, a K-type and an M-type three light-years apart, had changed their emission spectrum completely to non-visible infra red. For a few brief months the discovery had caused some excited debate among the remnants of the astronomy fraternity about how they could decay into red giants so quickly, and the extraordinary coincidence of two stellar neighbours doing it simultaneously. Then a newly settled planet fifty light-years farther out from Earth reported that the pair were still visible in their original spectrum. Working back across the distance, checking the spectrum at various distances from Earth allowed astronomers to work out that the change to both stars had actually taken place over a period of approximately seven or eight years and was simultaneous. Given that speed, the nature of the change ceased to become a question of astronomy; stars of that nature took a great deal longer to transform themselves into red giants." -- Peter F. Hamilton. Pandora's Star