[onetwo_threefour]

You did miss it, but not in this article. This article assumes some background knowledge of the subject to create a nerdy little in joke. As was pointed out by other posters, previous estimates have included calculations of the amount of mass-equivalent energy required to be equivalent to things like the the mass if a few suns, or more recently, the mass of Jupiter. The 'joke' being made is in reference to that. The author is saying, 'a few thousand pounds is a lot less than say the mass of Jupiter', not because the mass of Jupiter and a few thousand pounds are in any way in the same order of mass, but to compare the results of current thinking with previously publicized estimates of the energy requirements.
That's the point you're missing.