By Topic

Waiting for Godot? [AP-S Turnstile]

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Bansal, R. ; Univ. of Connecticut, Storrs, CT, USA

Over the last three centuries, there have been many advances in optical telescopes. To find planets that may support life like our own planet, astronomers have to search for planets that orbit stars at the "Goldilocks" distance: not so close that they will be unbearably hot "Jupiters," and not so far away that they will be frozen "Plutos." Locating objects within the bright glare of a host star is no easy task. However, as reported in a recent paper in Nature by a Jet Propulsion Laboratory (JPL) group, scientists have made tremendous progress in the field. The JPL group used "wavefront correction" techniques applied to coronagraphs to optically observe a planet orbiting its host 33 light years away, with a relatively small (1.5 m) Earth-based telescope. When it comes to searching for extraterrestrial intelligence (SETI), the tool of choice for the last fifty years has been a radio telescope, rather than an optical telescope. Almost 1,000 star systems have been scrutinized for "intelligent" radio signals using increasingly sophisticated phased-array antennas. The Allen Telescope Array (funded largely by Paul Allen, cofounder of Microsoft) in California currently has 42 dish antennas, each 6 m in diameter. It is eventually supposed to grow to 350 dishes, and should be able to observe one million star systems within a decade.

Published in:

Antennas and Propagation Magazine, IEEE  (Volume:52 ,  Issue: 3 )