What was the first extrasolar planet?

The first discovered extrasolar planets were a few rocky objects orbiting PSR B1257+12, Pulsar in the constellation of the Virgin, 980 light -years from Earth. Radio Astronomers Aleksander Wolszczan (Polish) and Dale Frail (Canadian) were credited to Find, which was announced in 1992 and quickly confirmed.

Since 2007, 242 extrasolar planets have been known. It is believed that at least 10% of the solar stars have planets, although the actual value can be much higher. The discovery of planets orbiting PSR B1257+12 was a surprise to astronomers at the time, because they were Pulsar planets, and it was generally assumed that planets created only around the main sequence stars. The third planet, PSR B1257+12A, which is closest to the star, was discovered a few years after others. Two larger planets are approximately four times greater by the Earth's weight. The pulse that orbits is the rest of the of and supernova. It is not known whether these extrasolar planets were created before supernova, perhaps rocky cores of former gasThe giants who have gotten rid of most of their matter during the Nova or during the post-Nov-round formation of the planet. Extrasolar planets of the orbit 0.36 AU (astronomical units, 1 au equals the distance between the Earth and the Sun) and the 0.46 AU from their star.

PSR B1257+12 is a millisecond pulsar, a type of neutron star, and was discovered in 1990 by Wolszczan using the Arecibo cosmic telescope. Irregularities in the pulse period led Wolszczan and fragile to carefully explore the system for possible extrasolar planets. Of course they were successful. Pulsars emit a huge amount of radiation, more than enough to fry any life on the surface of the orbits, so PSR B1257+12B and PSR B1257+12C are the last places we would look for Extraterrestrial Life. Pulsar has a rotary period of 6.22 milliseconds and is 800 million years old.

Although it was not the first to discover, the most famous extrasolar planETA is probably Gliese 581c, because of its relative proximity (20 light -years), earth's matter and its location in the "habitable zone" of its star, a zone that could theoretically maintain life.