The Space & Beyond Blog

­The discovery of planets outside our solar system | Exoplanets

What is an exoplanet and how many planets have been discovered outside our solar system?

51 Pegasi b

An artist’s impression of 51 Pegasi b (center) and its star (right). Source: ESO/M. Kornmesser/Nick Risinger ( via Wikimedia

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Planets in the Milky Way

An artist’s impression of the orbiting planets and their stars in the Milky Way. Source: M. Kornmesser / ESO

Earth next to a Super Earth

An artist’s concept of Earth in comparison to 55 Cancri e, a super earth exoplanet. Source: NASA/JPL-Caltech/R. Hurt (SSC)

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