Following news of the discovery of a new planet in Alpha Centauri
, a look at how scientists discover new planets:
"I’d come to meet Debra Fischer, a professor at San Francisco State University. As a co-discoverer of more than 150 planets, nearly half the known total outside our solar system, she is a prominent figure in astronomy. Her work on this lonely mountaintop could propel her past that, though, into realms of myth and legend. Fischer is using a modest, neglected telescope at CTIO to search for Earth-like planets in Alpha Centauri, the nearest star system to our own. If they exist, she should find them in three to five years.
"The implications would be timeless, echoing ancient questions of life’s purpose, outlining futures distant yet possible. Against the certainty of another Earth circling one of the closest stars in the sky, the entirety of recorded history would abruptly seem the briefest prelude to an eternal denouement, a fire kindled to be passed on without end. Alpha Centauri could become a beacon illuminating and bringing significance to the accumulated toils of generations. Driven by the spectral hope of another living world unexplored, our own could profoundly change. Or Fischer’s project could simply fail. Many astronomers assume it will."
PUBLISHED: May 19, 2009
LENGTH: 22 minutes (5602 words)