November 2017 - Utah-Astronomy - mailman.xmission.com

Re: [Utah-astronomy] Last night's lecture
by Joe Bauman 12 Dec '18

12 Dec '18

Brent, speaking of the ISS, I have wondered if it could be put into an orbit that continuously cruised between Earth and Mars. When it swung by Mars it could drop off and retrieved crews. I don't see how the radiation would be any worse than the ISS crews are already exposed to. ------------------------------ On Wed, Feb 25, 2015 8:18 AM MST Brent Watson via Utah-Astronomy wrote: >I attended the lecture last night on trajectories. It was really a good, stimulating talk. Thanks for passing the word along. >There were some interesting side comments made about our launch capabilities and the Mars One effort. Mr. Adamo was not at all enthusiastic about the Mars One effort. His opinion is that the effort is doomed because there is not really a way to assure that folks going there would be safe - primarily from radiation. He has done some work with a former flight surgeon on designing a spacecraft to go to Mars. Their result is that in order to get sufficient shielding (using a water jacket), the spacecraft's mass would be around 380 metric tons. That is for a small crew, probably only about 5 members. For a point of comparison, the ISS mass is 400 metric tons. He made the comment that an astronaut who made this trip could only go to space once in this craft, and then he would be at the limit of radiation exposure for his life. The NASA limit is an increased risk of developing cancer of 5%. >That brings us to our current launch capability. Our latest heavy lift rocket - the one we are currently developing - will have the capability to lift 130 metric tons to a very low earth orbit. So low, in fact, that it would burn up at perigee. The Apollo 17 Saturn 5 rocket lifted 140 metric tons into earth orbit -- higher than the new rocket will go. (I am sorry, but my mind will not allow me to recall the name of our currently being designed rocket.) Recall that it took several dozen shuttle launches to assemble the ISS. The Mars One vehicle would require either a hugely more massive launch rocket or a similar effort to build the craft. >As I mentioned, it was a very intellectually stimulating lecture and did involve several ordinary differential equations. They were nicely explained in English by Mr. Adamo. This was the first time I have seen some real math put to Kepler's laws. There were many charts showing what it takes to leave the earth and go to the moon or Mars. It was a very well done lecture. >The above is my recollection of the lecture, and may not actually represent the opinions of Mr. Adamo. It is only my interpretation of what he said. He knows his stuff, that is apparent. Thanks Patrick and Dr. Sohl for passing the word along. >_______________________________________________ >Utah-Astronomy mailing list >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy > >Send messages to the list to >Utah-Astronomy(a)mailman.xmission.com > >The Utah-Astronomy mailing list is not affiliated with any astronomy club. > >To unsubscribe go to: >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Then enter your email address in the space provided and click on "Unsubscribe or edit options".

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2 Large, Classic Cave Astrolas For Sale
by Chuck Hards 30 Nov '17

30 Nov '17

As I continue with my pre-retirement downsizing, I am faced with selling two classic Newtonians from Cave Optical Company. Both are highly collectible as well as being outstanding astronomy telescopes. 1. Cave 12.5" Observatory Model. I am the third owner. Very large, deluxe Newtonian on massive observatory equatorial mount. Mirror made in 1967 is in excellent condition and does not need a recoat! Kept in an observatory forty years and in my garage for two, disassembled. Would make a wonderful retirement observatory telescope. 2. Cave 10" Chrom Super Custom Deluxe transportable. Has an 8" Byers drive retrofitted but comes with the stock factory drive, for the collector and purist. I am the second owner. This scope comes with two primary mirrors, the original and a Galaxy mirror that is currently installed and was purchased by the original owner for astro-photography. Comes with a JMI low-profile 2" Crayford focuser installed, and a Tasco (Royal Astro) 77mm guidescope, recently restored by myself. Mounted on casters, so it can be rolled-out of a garage or shed, already set-up. Both of these are large, classic Newtonians that will also appreciate in value over time as an investment. Serious inquiries only, email me at: chuck.hards(a)gmail.com Thanks for your time!

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Re: [Utah-astronomy] Planetaries and Baby
by chuck.hards 19 Nov '17

19 Nov '17

You got the scope back with the new optics? Outstanding Joe! Sent from my Verizon, Samsung Galaxy smartphone null

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Planetaries and Baby
by Joe Bauman 19 Nov '17

19 Nov '17

Hello Subscribers, I’ve been thinking about theend of our star and the planetary nebula that will result. You can read allabout it in my new blog, “Planetary Nebulas … and Baby!” at http://the-nightly-news.com/blog/planetary-nebulas-and-baby Oh yes, guess what? Baby hascome home. Please be an extra-coolperson and tell your friends about the astronomy blog. They can subscribe for freeat http://the-nightly-news.com/ Thank you, Joe Bauman

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Haro 3-75
by astrodeb＠beyondbb.com 15 Nov '17

15 Nov '17

Hi! I have been looking for some challenge objects for my next observing session. I found Haro 3-75 in northern Orion. It's got a magnitude of 13.9 so I need to head into the desert for darker skies. It's size is 24" so it should not be too hard to spot if the transparency is good. I found some info on it at the Skyhound website. It says it appears more like an elliptical galaxy than a planetary nebula. Here is the link. https://observing.skyhound.com/archives/jan/H_3-75.html It says a 12 inch telescope is required for this one. Has anybody seen this object? I'm going to put it in the computer. Clear Skies, Debbie

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Observatory in Grantsville
by Dale Wilson 15 Nov '17

15 Nov '17

I broke ground for my observatory here in Grantsville back in September. I've posted all my pics on a facebook page called "Observatory in Grantsville". I'm very green when it comes to all this tech stuff. So, if something doesn't work right, I can always use a nudge in the right direction. Dale Wilson

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Carl Sagan's Car
by Chuck Hards 12 Nov '17

12 Nov '17

Some of you in my age demographic may remember that Carl Sagan drove a Porsche 914. I found this story online, it appears the car was sold on eBay last year: http://flatsixes.com/cars/for-sale-cars/carl-sagans-914-phobos-for-sale/

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Fireball 11_9_17
by Sue Ellen Ebertz 10 Nov '17

10 Nov '17

Cool, Chuck, were you out observing this am? Does anyone know how to read this data, or see if any of these fireball videos are our local one? Thanks, Shoshana https://fireballs.ndc.nasa.gov/

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Terrific fireball this morning
by Chuck Hards 10 Nov '17

10 Nov '17

I saw a big, bright, slow-moving fireball at about 5:35 AM this morning, low in the north-northwest, didn't flame-out until (apparently) very close to the ground. Moving west-to-east from my point of view, looks like any possible strewnfield would be close to I-15 anwhere between Bountiful and the Idaho border. Really bright, and at least a quarter of a degree wide at maximum, vivid green. Lots of smaller chunks falling away as it broke-up. I haven't seen a big one in a while so this one was welcome.

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The color of stars
by Joe Bauman 09 Nov '17

09 Nov '17

Dear Friends, Please take a read of mylatest blog, “The color of stars,” http://the-nightly-news.com/blog/blog-33-the-color-of-stars If you like it, I’d greatlyappreciate your telling friends about it. They can subscribe for free at thehomepage, http://the-nightly-news.com/ Thank you, Joe Bauman

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