More than 4,000 planets beyond our solar system have been discovered since the first in 1992.
NASA has released a time lapse video showing the discovery of exoplanets—planets beyond our solar system—since the first in 1992.
At first, the rate of exoplanet discovery was slow. In 2000, just 32 had been confirmed by scientists. But numbers started to increase dramatically after 2009, when NASA launched the Kepler space telescope—a craft designed to search for alien planets in our part of the Milky Way.In the video, rings appear to show the location of newly found exoplanets.
Over its two-year run, TESS is expected to find around 20,000 exoplanets, including 17,000 that are bigger than Neptune, and dozens that are the same size as Earth.. Alex Wolszczan and Dale Frail announced they had found at least two planets orbiting the pulsar PSR1257 + 12—a rapidly rotating neutron star. Neutron stars are believed to form from the collapsed core of a massive star following a supernova explosion.
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