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Record 7 of 1181
Searching for Planets Around other Stars
Abstract: In this colloquim presentation, Professor of Astronomy, Geoffrey Marcy discusses the discovery of planets orbiting other stars. Using the Doppler shift caused by stellar wobble that is caused by nearby planetary mass, astronomers have been able to infer the existence of Jupiter-sized planets around other stars. Using a special spectrometer at Lick Observatory, the wobble of several stars have been traced over the years required to generate an accurate pattern required to infer the stellar wobble. Professor Marcy, discusses the findings of planets around 47 Ursae Majoris, 16 Cygni B, 51 Pegasus, and 56 Rho 1 Cne. In the case of 56 Rho 1 Cne the planet appears to be close to the star, within 1.5 astronomical units. The observations from the smaller Lick Observatory will be augmented by new observations from the larger telescope at the Kek observatory. This move will allow observations of smaller planets, as opposed to the massive planets thus far discovered. The astronomers also hope to observe smaller stars with the Kek data. Future spaceborne observations will allow the discovery of even smaller planets. A spaceborne interferometer is in the planning stages, and an even larger observatory, called the Terrestrial Planet Finder, is hoped for. Professor Marcy shows artists' renderings of two of the planets thus far discovered. He also briefly discusses planetary formation and shows slides of both observations from the Orion Nebula and models of stellar system formation.
Publication Date: Jan 28, 1998
Document ID:
20000013498
(Acquired Feb 11, 2000)
Subject Category: ASTRONOMY
Report/Patent Number: AVC-1998-067, NONP-NASA-VT-1999206897
Document Type: Motion Picture
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA United States
Description: In English; Videotape: 1 hr. 19 min. playing time, in color, with sound
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: PLANETARY EVOLUTION; PLANETARY MASS; STELLAR EVOLUTION; CELESTIAL BODIES; EXTRASOLAR PLANETS; GAS GIANT PLANETS; PLANETARY SYSTEMS; HYPOTHETICAL PLANETS; STELLAR ORBITS; INTERFEROMETERS; SOLAR SYSTEM; TERRESTRIAL PLANETS; SPECTROMETERS; DOPPLER EFFECT; BROWN DWARF STARS
Availability Source: Johnson Space Center Media Center
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