Rich wrote: It's nothing that those on this board haven't thought about but, the chances of a cataclysmic collision occurring in our lifetime is a reality. It is a scary reality! I wonder, is the monitoring of near earth objects as comprehensive as it needs to be? Do we have automated monitors or are we depending on human observation? Patrick will probably give the definitive answer on this but, he is still asleep I think. Patrick led me to the Yahoo Minor Planetary and something or other Yahoo group. Those boys seem to feel things are pretty well under control. Quoting Alain Maury he states: “Apart from the very very very unlikely long period comet arriving from the Oort cloud and falling just on us, there are no more objects able to "end life as we know it" anywhere in the solar system which has not been detected. We are at the 70%, 80% level on the 1km diameter asteroids (or better phrased magnitude 18 and brighter asteroids), and a "global killer" is more like a 10km asteroid, and we all know them and none is anywhere near an impacting orbit.” He goes on to say: “Very quickly (let's say another 5 years of hard work), the only worry left will be in the 200m range, i.e. "state" destroyers, not "continent destroyers". So if these guys know what they are talking about then your statement “, the chances of a cataclysmic collision occurring in our lifetime” still may be true but should not be to the point of “scary” I think. For what it’s worth Jim Gibson --- On Tue, 1/27/09, Ilove2getSpam@gmail.com <ilove2getspam@gmail.com> wrote: From: Ilove2getSpam@gmail.com <ilove2getspam@gmail.com> Subject: Re: [Utah-astronomy] More on Upheaval Dome To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Tuesday, January 27, 2009, 10:28 AM It's nothing that those on this board haven't thought about but, the chances of a cataclysmic collision occurring in our lifetime is a reality. It is a scary reality! I wonder, is the monitoring of near earth objects as comprehensive as it needs to be? Do we have automated monitors or are we depending on human observation? Just think, this picture was most likely the result of a deflection not an impact... [image: http://upload.wikimedia.org/wikipedia/commons/a/ad/Tunguska.png] *Tunguska Event - June 30, 1908* *June 30, 2008:* The year is 1908, and it's just after seven in the morning. A man is sitting on the front porch of a trading post at Vanavara in Siberia. Little does he know, in a few moments, he will be hurled from his chair and the heat will be so intense he will feel as though his shirt is on fire. That's how the Tunguska event felt *40 miles* from ground zero. Today, June 30, 2008, is the 100th anniversary of that ferocious impact near the Podkamennaya Tunguska River in remote Siberia--and after 100 years, scientists are still talking about it. -Rich On Tue, Jan 27, 2009 at 12:13 PM, <zaurak@digis.net> wrote:
Has the park service accepted the impact crater explanation? Do they still talk about the "salt" theory? Anyway lets hope future impact craters happen far from where we live.
--- ilove2getspam@gmail.com wrote:
From: "Ilove2getSpam@gmail.com" <ilove2getspam@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Subject: Re: [Utah-astronomy] More on Upheaval Dome Date: Tue, 27 Jan 2009 11:30:01 -0500
Even still, the hypothesis was controversial. I'm still not sure if the controversy has been truly eliminated. I'll leave that to the educated folks on this list to determine!
-Rich
On Tue, Jan 27, 2009 at 11:07 AM, Chuck Hards <chuck.hards@gmail.com> wrote:
Not to take away anything from Kurt's work, but the Observer's Handbook has for years listed the most significant impact craters in North America and Upheaval Dome has been on there for a while. A table lists latitude, longitude, approximate age, surface expression, and visible geologic features. A simplified map shows approximate location. The governor and general public can be excused, but I'm surprised that it doesn't seem to be more common knowledge among those in the hobby.
From comments I've read on the list lately, I get the impression that few amateurs take advantage of the Observer's Handbook every year.
Patrick, how many orders did you take for the 2009 edition? Have you noticed a downward trend over the years? _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com