Artist’s impression of the exoplanet 51 Pegasi b

Artist's impression of the exoplanet 51 Pegasi b

Scientists spotted water in the atmosphere of 51 Pegasi b, one of the first exoplanets ever been discovered. It is around 50 light years away – so we can call it a “nearby” exoplanet – and it is in the constellation of Pegasus.

51 Pegasi b is not marked a breakthrough in astronomical research for the first time: back in 1995, it was the first exoplanet to be discovered orbiting a main-sequence star. The first confirmed exoplanet discovery came in 1992, when several terrestrial-mass planets orbiting the pulsar PSR B1257+12.

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