The Stars || News || About Stars | Nearest Stars | Big Stars | Special Stars | Exoplanets | Prototype Stars || Constellations || Galaxies || Planets | Moons | Solar System || Convert Values || Stellar Records || Imprint & Privacy

         

Anzeige


PSR B1257+12

This is a pulsar with a whole planetary system, amongst it the smallest planets discovered so far. And it has a wide dust disk.
Three planets with 0.02 , 4.3 and 3.9 times the mass of Earth are quite close with 0.19 - 0.46 AU distance. A forth mini planet with only 1/5 the mass of Pluto (0.0004 * Earth) is 3-5 AU away.

The conditions in such a system should be so extreme that life there is impossible.
It is nor sure if the planets survived the supernova of the progenitor star (which is hard to imagine!) or formed later.

Constellation: Virgo
Distance: 1500 light-years

Back: List of Exoplanets
    PSR B1257+12
A pulsar with dust disk.
Graphic: Nasa

    Astronomical articles released under Creative Commons: Imprint & Privacy
This site in German: Sterne und Planeten


Anzeige

Astronomy: Stars & Planets | © Jumk.de Webprojects

Images of Chemical Elements