HD70642: A Star with Similar Planets . ... Credit Copyright: David A. Hardy, PPARC Explanation: Astronomers have discovered a planetary system more similar to our own Solar System than any known previously . ... Now a planet with twice Jupiter's mass has been discovered in a nearly circular orbit at approximately half the orbital distance of Jupiter. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ...