Is the safe Planck telescope retirement an heliocentric orbit? jd Planck <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbWFpbGluZ2lkP TIwMTMxMDIxLjI0Mjg5OTUxJm1lc3NhZ2VpZD1NREItUFJELUJVTC0yMDEzMTAyMS4yNDI4OTk1M SZkYXRhYmFzZWlkPTEwMDEmc2VyaWFsPTE3ODI4OTc4JmVtYWlsaWQ9am9obmRvbUBza3luZXQuY mUmdXNlcmlkPWpvaG5kb21Ac2t5bmV0LmJlJmZsPSZleHRyYT1NdWx0aXZhcmlhdGVJZD0mJiY=& &&100&&&http://www.esa.int/Our_Activities/Operations/Planck_on_course_for_sa fe_retirement> on course for safe retirement 21-10-2013 02:05 PM CEST <http://www.esa.int/var/esa/storage/images/esa_multimedia/satellite_images/p lanck/12048849-1-eng-GB/PLANCK_small.jpg> In preparation for its final switch-off on 23 October, mission controllers today fired Planck's thrusters to empty its fuel tanks. The burn is one of the final steps to ensure that Planck ends its hugely successful mission in a permanently safe configuration. 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