• November 10, 2011

    Episode 363: New Planets in Old Data

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    Finding extrasolar planets seems to be routine these days, with a variety of telescopes using different techniques to find them. In some cases, once the planets are found, it pays to go back and see if the planets were unknowingly detected in earlier data. Recently, analysis of data taken with the Hubble Space Telescope in 1998 revealed extrasolar planets that were discovered years later by another observatory. Why bother? Well, scientists now have additional observations that show the slow movement of the planets around their parent star. Knowing the orbits of the extrasolar planets tells us a lot about those systems.