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2010•Oxford University Press eBooksRequires access

7. Exoplanets

David A. Rothery

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Abstract

Planets are common around Sun-like stars. ‘Exoplanets’ examines this type of planet. The first discovery of an exoplanet was made in 1995, and hundreds of exoplanets are now known to exist. Exoplanets have been found by detecting slight changes in a star's radial velocity, and by looking for ‘transits’ (a tiny fraction of a star's light that is cut off during the passage of an exoplanet in front of it) using Earth-based and space-based automated telescopes. What do we actually know about exoplanets? Are they named? How do we image them? How many multiple exoplanet systems are there, and is it possible that life could thrive on exoplanets?

About this research paper

What this paper is about

Planets are common around Sun-like stars. ‘Exoplanets’ examines this type of planet. The first discovery of an exoplanet was made in 1995, and hundreds of exoplanets are now known to exist. Exoplanets have been found by detecting slight changes in a star's radial velocity, and by looking for ‘transits’ (a tiny fraction of a star's light that is cut off during the passage of an exoplanet in front of it) using Earth-based and space-based automated telescopes. What do we actually know about exoplanets? Are they named? How do we image them? How many multiple exoplanet systems are there, and is it possible that life could thrive on exoplanets?

Why it matters

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Available abstract

Planets are common around Sun-like stars. ‘Exoplanets’ examines this type of planet. The first discovery of an exoplanet was made in 1995, and hundreds of exoplanets are now known to exist. Exoplanets have been found by detecting slight changes in a star's radial velocity, and by looking for ‘transits’ (a tiny fraction of a star's light that is cut off during the passage of an exoplanet in front of it) using Earth-based and space-based automated telescopes. What do we actually know about exoplanets? Are they named? How do we image them? How many multiple exoplanet systems are there, and is it possible that life could thrive on exoplanets?

Key concepts: Exoplanet, Planet, Astronomy, Astrobiology, Physics, Stars, Direct imaging, Optics

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