September 3rd, 2009
September 3rd: Gravitational Lensing
Date: September 3, 2009
Title: Gravitational Lensing
Podcaster: SkyLK
Organization: SkyLK http://skylk.com
Description: A gravitational lens is created when the light from a distant source is bent due to the existence of a massive object between the observer and source. The object could be a galaxy, black hole or a cluster of galaxies, and this phenomenon is known as gravitational lensing. Light rays composed of photons are attracted by the gravity of the mass of the massive object, resulting the linear path of light be curved, thus changing the velocity as well. Hence, the apparent image of the source can be distorted and magnified. This phenomenon was first mentioned in 1924 by the St. Petersburg physicist Orest Chwolson, and was later quantified by Albert Einstein in 1936.
Bio: Skylk.com is an astronomy information portal from Sri Lanka. Since the official launch in January 2009, skylk has being offering podcasts, articles and other interactive content in native Sri Lankan language (sinhala).
Today’s sponsor: This episode of ’365 Days of Astronomy” is sponsored by the American Astronomical Society, the major organization for professional astronomers in North America, whose members remind everyone that One Sky Connects Us All. Find out more or join the AAS at aas.org.
Transcript:
***Transcript coming soon.***
End of podcast:
365 Days of Astronomy
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The 365 Days of Astronomy Podcast is produced by the New Media Working Group of the International Year of Astronomy 2009. Audio post-production by Preston Gibson. Bandwidth donated by libsyn.com and wizzard media. Web design by Clockwork Active Media Systems. You may reproduce and distribute this audio for non-commercial purposes. Please consider supporting the podcast with a few dollars (or Euros!). Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org. Until tomorrow…goodbye.
Tags: podcast iya 365
