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“Exoplanet Names: PSR 1257 b and PSR 1257 c

Star/Constellation Name: PSR 1257/Virgo

Distance from Earth: 978 light-years (One light-year equals the distance light in a vacuum travels in a year: 5.88 trillion miles, or 9.46 trillion kilometers.)

Exoplanet Mass: 4.1, 3.8 Earths (0.013 and 0.012 Jupiter)

Distance from Host Star: 0.36, 0.46 AU (An AU, or astronomical unit, is the average distance between Earth and the sun, which is about 93 million miles, or 150.6 million kilometers.)

Year Discovered: 1991” source...