Talk:Calabash Nebula

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[edit] What does this mean?

"PPN) 1.4 light years (13 Pm) long and located some 5,000 light years (47 Em) from Earth in the constellation Puppis."

What are "13 Pm" and "47 Em" ? It looks like they should either be references or measurements, but I can't figure it out. --Keflavich 20:17, 12 May 2007 (UTC)

Petametres and Exametres. See SI prefix. Modest Genius ^talk 19:38, 13 April 2008 (UTC)