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Closest exoplanet is found

Astronomers claimed to find a planet orbiting a star in the Alpha Centauri system. It is the closest star system to the Sun. It is composed from three stars: Alpha Centauri A, B and C. The proposed planet was to orbit Alpha Centauri B. It was named Alpha Centauri Bb. Its existence was however disproved in 2016.

Kepler's Nova is observed for the first time

SN 1604, also known as Kepler's Supernova, Kepler's Nova or Kepler's Star, was a supernova of Type Ia that occurred in the Milky Way, in the constellation Ophiuchus. Appearing in 1604, it is the most recent supernova in our own galaxy to have been unquestionably observed by the naked eye, occurring no farther than 6 kiloparsecs or about 20,000 light-years from Earth.

Anniversaries of the (in)famous