Three planets for Upsilon Andromedae

  title={Three planets for Upsilon Andromedae},
  author={Jack J. Lissauer},
In 1997 a planet of roughly Jupiter's mass was discovered in orbit around the star Andromedae. Two more have now been identified, providing the first example of a solar system other than our own containing more than one planet. 

Figures from this paper

The Discovery of the First Exoplanet Orbiting a Solar-Type Star
Didier Queloz is Professor of Physics at the Cavendish Laboratory (University of Cambridge) and Geneva University. He was jointly awarded the 2019 Nobel Prize in Physics for “the discovery of anExpand
Analysis of the Hipparcos Measurements of υ Andromedae: A Mass Estimate of Its Outermost Known Planetary Companion
We present an analysis of Hipparcos astrometric measurements of υ Andromedae, a nearby main-sequence star around which three planet candidates have recently been discovered by means of radialExpand
Astrophysics in 1999
The year 1999 saw the arrival of a star with three planets, a universe with three parameters, and a solar corona that could be heated at least three ways. In addition, there were at least threeExpand
Extra-solar planets
The discovery of the first extra-solar planet surrounding a main-sequence star was announced in 1995, based on very precise radial velocity (Doppler) measurements. A total of 34 such planets wereExpand
Stability and chaos in the υ Andromedae planetary system
The detection of three planets orbiting the star ? Andromedae marks the first discovery of a multiple-planet extrasolar system associated with a main-sequence star (Butler et al. 1999). The unusualExpand
Stability Analysis of the Planetary System Orbiting υ Andromedae
We present numerical orbital integrations designed to test the stability of the three planets detected in orbit around υ Andromedae and possible smaller bodies orbiting in the system which have notExpand
The Upsilon Andromedae system is the rst exoplanetary system to have the relative inclination of two planets’ orbital planes directly measured, and therefore oers our rst window into the 3dimensionalExpand
Extrasolar Planetary Systems
The discovery of planetary systems around alien stars is an outstanding achievement of recent years. The idea that the Solar System may be representative of planetary systems in the Galaxy in generalExpand
Resonant Structure of the Outer Solar System in the Neighborhood of the Planets
The stability of the outer solar system is studied using a new numerical method for detecting the chaoticity of planetary motion. We explore a large portion of the phase space where the outer solarExpand
On Stellar Activity Enhancement Due to Interactions with Extrasolar Giant Planets.
We present a first attempt to identify and quantify possible interactions between recently discovered extrasolar giant planets (and brown dwarfs) and their host stars, resulting in activityExpand


A Jupiter-mass companion to a solar-type star
The presence of a Jupiter-mass companion to the star 51 Pegasi is inferred from observations of periodic variations in the star's radial velocity. The companion lies only about eight millionExpand
A planetary system around the millisecond pulsar PSR1257 + 12
MILLISECOND radio pulsars, which are old (∼109yr), rapidly rotating neutron stars believed to be spun up by accretion of matter from their stellar companions, are usually found in binary systems withExpand
Protostars and Planets VI
Various papers on the formation of stars and planets are presented. The general topics addressed include: molecular clouds and star formation, young stellar objects and circumstellar disks, chemistryExpand