Lecture22.doc - ExtrasolarPlanets

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Extrasolar Planets Why hasn’t it been possible to just make deep images of stars with big telescopes  to detect planets orbiting around them?  Ans:  The planets are very dim compared to the  star and the light is swamped by the glare of the star itself, so other techniques are needed  It is possible to make such images in some cases in the infrared portion of the spectrum  through special techniques, but as of this class none has been definitely identified. The combination of Newton’s second and third laws of motion imply that the pull  of gravity by a plant on its central star is the same as the pull of the star on the planet,  except that the Sun’s acceleration (that is, its orbital velocity) is smaller because the mass  of the star is so much larger. Starting in 1995, the first planets were found around other stars by observing 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/02/2011 for the course ASTRO 10 taught by Professor Norm during the Spring '06 term at University of California, Berkeley.

Page1 / 2

Lecture22.doc - ExtrasolarPlanets

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online