Extra-Solar Planets
M. A. C. Perryman

TL;DR
This paper reviews the discovery, methods, and theoretical understanding of extra-solar planets, highlighting recent findings, detection techniques, and the pursuit of habitable worlds beyond our Solar System.
Contribution
It provides a comprehensive overview of the state of extra-solar planet research, including new discoveries, detection methods, and theoretical models of planetary atmospheres and habitability.
Findings
34 known extra-solar planets by 2000
Detection of planets via radial velocity, astrometry, microlensing, and transits
Advances in imaging and spectral analysis of exoplanets
Abstract
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 were known by the end of March 2000, and their numbers are growing steadily. The newly-discovered systems confirm some of the features predicted by standard theories of star and planet formation, but systems with massive planets having very small orbital radii and large eccentricities are common and were generally unexpected. Other techniques being used to search for planetary signatures include accurate measurement of positional (astrometric) displacements, gravitational microlensing, and pulsar timing, the latter resulting in the detection of the first planetary mass bodies beyond our Solar System in 1992. The transit of a planet across the face of the host star provides significant physical…
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Taxonomy
TopicsAstro and Planetary Science · Stellar, planetary, and galactic studies · Planetary Science and Exploration
