NASA has announced a new milestone in the hunt for planets around other star systems, known as "exoplanets". The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Humanity has been looking at the stars for a long time, but the earliest detections of planets orbiting around them have come in the last century, with improvements to telescope technology. But when we first made a detection of an exoplanet is a little murky, with possible sightings of such planets possibly going back to 1917, though only being confirmed a century later.

The first confirmed discovery of an exoplanet was announced in 1992 , when astronomers Aleksander Wolszczan and Dale Frail reported two or more planet-sized bodies orbiting pulsar PSR1257 + 12 using the Ariceb

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