pulsar planet造句

• He is the co-discoverer of the first extrasolar planets and pulsar planets.
• However, this was later retracted, just before the first real pulsar planets were announced.
• There are three types of pulsar planets known so far.
• It was the fourth known extrasolar planet, excluding pulsar planets.
• "' Pulsar planets "'are planets that are found orbiting pulsars, or rapidly rotating neutron stars.
• In 1991, Andrew G . Lyne announced the first ever pulsar planet discovered around PSR 1829-10.
• The pulsar planet is most likely composed largely of crystalline carbon, but with a density far greater than diamond.
• In 1979, two extrasolar planets were announced to be orbiting the pulsar ( being classified as pulsar planets ).
• Aleksander Wolszczan ( born 1946 ), a Polish astronomer, is the co-discoverer of the first extrasolar planets and pulsar planets.
• There was doubt concerning the discovery because of the retraction of the previous pulsar planet, and questions about how pulsars could have planets.
• May be the first extrasolar planet ever detected, predating the 1992 pulsar planets found around PSR B1257 + 12 and main-sequence yellow dwarf 51 Pegasi.
• These were the first two extrasolar planets confirmed to be discovered, and thus the first multi-planet extrasolar planetary system discovered, and the first pulsar planets discovered.
• These were the first discovery of extrasolar planets to be confirmed; as pulsar planets, they surprised many astronomers who expected to find planets only around main-sequence stars.
• Additional uncertainty surrounded the system, because of a claim of an earlier pulsar planet around PSR 1829-10 that had to be retracted due to errors in calculations.
• In 2003 Maciej Konacki and Wolszczan determined the orbital inclinations of the two pulsar planets, showing that the actual masses are approximately 3.9 and 4.3 Earth masses respectively.
• In 1991 Andrew Lyne, M . Bailes and S . L . Shemar claimed to have discovered a pulsar planet in orbit around PSR 1829-10, using pulsar timing variations.
• The discovery stimulated a search for planets orbiting other pulsars, but it turned out such planets are rare; only one other pulsar planet, orbiting PSR B1620-26, has been confirmed.
• In addition to being the first confirmed discovery of pulsar planets, the find is also generally considered to be the first confirmed discovery of extrasolar planets of any kind.
• Pulsar planets would be unlikely to harbour life as we know it, because the high levels of ionizing radiation emitted by the pulsar and the corresponding paucity of visible light.
• So, by the latest count, if the two pulsar planets are included, Dr . Adam Burrows of the University of Arizona said, " We now know of more planets outside the solar system than within ."