Comments on: The origin of Pluto’s moons http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/ I am an astronomer, writer, and skeptic. I likes reality the way it is, and I aims to keep it that way. My real name is Phil Plait, and I run the Bad Astronomy blog. Sun, 05 Jul 2009 05:00:18 +0000 http://wordpress.org/?v=2.3.1 By: lucio http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9273 lucio Sat, 27 May 2006 06:20:43 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9273 how much does it cost to go to the moon? and pluto? how much does it cost to go to the moon? and pluto?

]]> By: lucio http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9272 lucio Sat, 27 May 2006 06:19:18 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9272 what is the moons n plutos environment? what is the moons n plutos environment?

]]> By: David Moles http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9271 David Moles Fri, 06 Jan 2006 21:32:59 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9271 <i>Anything ejected from the surface would either escape entirely or fall back to the surface</i> I may be missing something, but why assume that ejecta would be ejected straight up? Anything ejected from the surface would either escape entirely or fall back to the surface

I may be missing something, but why assume that ejecta would be ejected straight up?

]]> By: SFwriter http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9270 SFwriter Wed, 04 Jan 2006 22:30:45 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9270 ...And to those who addressed the point "begging the question", you might want to look back a bit in etymological history to find the reason for the term. It's almost implicit in the term itself, but perhaps not obvious enough to grasp instantly. "Begging the question" was originally "beggaring the question" as in "leaving it wanting" like a beggar asking you for money... …And to those who addressed the point “begging the question”, you might want to look back a bit in etymological history to find the reason for the term. It’s almost implicit in the term itself, but perhaps not obvious enough to grasp instantly. “Begging the question” was originally “beggaring the question” as in “leaving it wanting” like a beggar asking you for money…

]]> By: Skeptic Rant http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9269 Skeptic Rant Wed, 04 Jan 2006 18:30:37 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9269 <strong>5 Random Links - Pluto, Charon</strong> This site has been added to Skeptic Rant's "5 Random Links" for January 4th. 5 Random Links - Pluto, Charon

This site has been added to Skeptic Rant’s “5 Random Links” for January 4th.

]]> By: Dean http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9268 Dean Wed, 04 Jan 2006 16:34:34 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9268 Another way to look at $650 million for the mission is to compare it to the cost of making the movies, which Phil was ranting about in another post. This is the equivalent of making Titanic, King Kong, and probably one of the LOTR movies. The nice thing is that when it is all done and we get results we won't be charged $10 a head to view the images! Another way to look at $650 million for the mission is to compare it to the cost of making the movies, which Phil was ranting about in another post. This is the equivalent of making Titanic, King Kong, and probably one of the LOTR movies. The nice thing is that when it is all done and we get results we won’t be charged $10 a head to view the images!

]]> By: John Charles http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9267 John Charles Wed, 04 Jan 2006 15:03:46 +0000 http://blogs.discovermagazine.com/badastronomy/2006/01/02/the-origin-of-plutos-moons/#comment-9267 Same types of arguments for ejecta as for captured bodies. Some sort of multi-body interaction would have to occur for impact ejecta from the surface to enter orbit around Pluto, as well. Anything ejected from the surface would either escape entirely or fall back to the surface, unless its velocity is somehow re-directed more horizontally. After all, rockets need to steer their way into orbit while thrusting, or somehow otherwise convert their vertical motion into horizontal motion. Maybe interactions among ejecta particles would bend the trajectories of some into orbit. Same types of arguments for ejecta as for captured bodies.

Some sort of multi-body interaction would have to occur for impact ejecta from the surface to enter orbit around Pluto, as well. Anything ejected from the surface would either escape entirely or fall back to the surface, unless its velocity is somehow re-directed more horizontally. After all, rockets need to steer their way into orbit while thrusting, or somehow otherwise convert their vertical motion into horizontal motion. Maybe interactions among ejecta particles would bend the trajectories of some into orbit.

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