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Posts Made By: Neil Barnett

August 13, 2018 02:56 AM Forum: ASTRONOMY

Gravity/Space-time Question

Posted By Neil Barnett

Think of space time as having a 'pressure' like water. Space time looks at matter as an infestation and it pushes on it. Two objects in space time would thin out the area between them more so than the area around outside them, thus the objects would be pushed together.

Try this thought experiment. Think of a single bit of mass in and entire universe by itself.  The space time around the mass is thinner closer to the mass and denser further away.

I don't like using the following idea because gravity is a property of space not matter. It is how space reacts to matter. None the less, think of matter as sucking in space time, like a vacuum cleaner sucking in air in a room. The air will be thinner closer to the vacuum cleaner. If you have two vacuum cleaners, the air between them will be thinner than the outside air around both objects. 

 It's actually the same thing in reality only reversed so to speak. It is not gravity from Earth that pulls you down, it is the pressure of space time on the Earths presence that crams you into the Earths surface.

If you want a real twist, try thinking about absolute spin.  If something is spinning, then it is spinning relative to some other object(s). What if there was only one object in a universe? Lets put two rockets on it opposite from each other and fire them off to spin up the object. The object will feel the force and react accordingly with rotational acceleration. Then turn the rockets off. Is the object spinning? Spinning relative to what? There is nothing else for it to be spinning in relation to. This is where the fabric of space time comes in. The object will be spinning relative to the 'stationary' space time that was there prior to the rockets firing. It's kind of like an object in water. Spin the object in water and the water will begin to rotate with it.

August 13, 2018 11:35 PM Forum: ASTRONOMY

Gravity/Space-time Question

Posted By Neil Barnett

Good thinking! This stuff is something that can really be a trick to get your head wrapped around it. Space time tends to act opposite in ways that matter energy do. Unfortunately, all we are and all we do, how we study, the equipment we use, the pencil and paper we take notes on, all is based in the existence of matter and energy. This fact makes it tuff to explain as well as grasp.  To show how some of this stuff works by using this world of matter and energy we live in ,well, ...hmmm, very careful analogies maybe.  I'm winging this so....OK....here is an example of something working rather opposite to how we experience things:

Consider the total energy in a spring. OK wait....think of a spring that is compressed. Never mind what is compressing it, just consider the existence of a spring in a compressed state. Now consider all the energy it encompasses. It has the energy contained in it's mass. Good ol' E=mc2. This is a lot of energy.  It also has some potential energy in being compressed. The potential energy will pale in comparison to the energy in it's mass. This is how it will be in just about any such situation as we experience it. Now, how about something that can contain massive potential energy with very little 'substance' ?  Welcome to the world of space time, except that there isn't any matter energy here to think about, to make it tangible. Come to think of it, it does go a long way towards making sense of dark energy being much more prominent compared to dark matter as calculated by the physics. (physics gives math purpose)  Lets move to your question now, I have a sad but hopefully functional analogy.

Consider a room of people, crowded, standing around, casual, comfy, just crowded, shoulder to shoulder, OK with the situation, stable but rubbing right against each other....and a door opens.  The door is not sucking people out, it's the people that naturally go out on their own. They approach the door, it's just what they do, they aren't under pressure like air in a balloon, they just approach the door, it's what they want to do. The crowd is thinner towards the door, thicker away from the door.  Lets try something better because space time would rather be proactive on matter so.....how about the white corpuscles. Those guys are proactive after infestations. They are wandering around in a nice uniform distribution, then that disgusting matter shows up. The corpuscles go for it, push onto it. The corpuscles distribution gets thinner close to the matter by their own nature as they attack and remain denser further away. The disgusting matter isn't sucking them in, it's what the corpuscles do.

Now you could go into saying things about how the corpuscles would be dense on the surface of the matter or what about the people outside the room. Analogies aren't perfect. You'll start to get into digesting concepts of singularities, and infinite densities, and never ending pondering. Ok, once I get going things kind of settle in so here's one for you. Think of an infinitely long magnetic spring. The spring is relaxed just hanging around. Then a piece of iron shows up. The end of the spring latches out to the iron. The spring is less dense close to the iron and the effect travels out along the spring forever to infinity. ooooohhh, ahhhhhh,  ok if you want to actively find failures in an analogy you can. I don't have a lot of time for this and it is a bit arduous to try to convey.  Hope this has helped.

August 14, 2018 07:07 PM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

Fine, how do I delete my initial post? If I can't then permission is given to let it be deleted internally. I'll rephrase in an undeniable cordial fashion with specific questions/suggestions.

Thank you.

August 16, 2018 07:16 PM Forum: AstroMart FAQ

cancel/delete an auction ?

Posted By Neil Barnett

Auctions have a generally accepted set of guidelines. Nothing set in stone.

It is considered unethical to cancel an auction if there are ANY bids.
It is OK to cancel an auction if there are NO bids whatsoever.
Having a reserve does not affect the above two guidelines.

A reserve is just another point in the auction that bidders take on as a goal, just as much as getting the high bid.

It is NOT ok to offer an item in any other venue if it is up for auction. Bids can come in from a variety of sources but all bids go to the same item at the same auction.

Once an item has a bid, the only way to legitimately negate the auction is due to rather extreme circumstances and such should be disclosed to the bidders. Some examples would be that the item was accidently destroyed, law enforcement, late discovery of a significant nondisclosure that would be generally considered detrimental (this is where disclosed reasons are due to bidders), and so on.  It better be a substantial and good reason, disclosed, or the seller will have themselves in hot water with the community in which they are dealing.

For the purposes of the auction venue, it can be easier to not allow the auction to be deleted at all. The winning bidder should be understanding since the circumstances  will be THAT SEVERE.

August 21, 2018 01:40 AM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

No.

How can I copy and paste my written part of an ad so I can use another venue to compose it?
I used to be able to do this.

The last time I posted, I had to put in one picture at a time, using the EDIT option to add each picture.
When I posted more than 4 or so pictures at one time, the "please wait" thing was perpetual until I finally closed the screen.
I tried a couple of times with a couple of ads and just a few pictures froze my comp completely till I logged out of Windows.

What is with the slower and slower and slower writing speed after a modest add entry? This is no way to control ad length, it would be a
total cop out method for that. It should be fixed. I would think it is an unintended artifact of some kind. A typical website approach is to give a set limit, with 'amount of writing left available' usually shown at the bottom of the text page. It seems this would be a simpler code as well if the slowing writing is intentional.

August 21, 2018 10:13 AM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

Windows 10
Dell desktop about 2 years old, dual processor
I tried both IE 11 and Edge 42

and I see that making a reply to inquiries here does not allow one to see the previous string of entries, this is a pain too.
I hit the respond key directly from email notice of reply. Maybe the this string can be viewed along with a current response if done from in the forum.

300K is a darn small picture in this day and age. Other sites seem to auto-reduce. However, I can and will resize as this is also a common practice (still).
I was taking my pictures off an XD card reader. I'll also try putting the pictures directly in the comp first and loading from the main frame with resized pictures.
Manual resizing in not a big deal. I'll also try an ad with direct from my camera XD card with reduced picture size to 333K as this is convenient. I'll do some testing today.

Every time I hit the enter key I get a double space and can't find a way to eliminate the double space. How can I start a new line manually without a double space? I've never seen this issue anywhere else on any kind of site.

Thanks for the input.  Does AM intend to do something about the lack of ability to copy/paste?

August 21, 2018 10:19 AM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

Just a test here.  So the string being replied to can not be seen while making a post.
Single space happens here when hitting the enter key, I couldn't get this while posting an ad.

This was a double enter key stroke and I got the double space and normal. While posting an ad, this would create a 4 line blank - double space for each hit on the ENTER key.  It would be nice to be able to make a list in an ad without double space.

August 21, 2018 04:22 PM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

Originally Posted by Greg Shaffer


Confirmed it puts blank line between lines in an ad, don't see a way around it and I agree it needs to be addressed.

If you want to see what you are responding to in the forums you must use the quote function instead of just hitting reply. While it is sometimes nice to be able to quote all of a prior response including a quote in the message you are replying to I know with the prior software it could make for a real mess as reply chains could get VERY long.....Even CN recently changed to limiting this.

As for image sizes, storage space costs and I am pretty sure there is probably a cumulative limit both in ads and in the forums. I don't see any advantage to single images over 500k and I usually keep mine under 300k. I do wish the forums would allow for direct upload of multiple images in a post like CN instead of just one....That limit has been one of the main reasons I am not more active in the forums here.

I don't know what the future plans for improvements are but I am sure over time improvements will continue to be made and hopefully Herb is continuing to monitor these types of posts and make notes. Being able to copy and paste in ads is definitely something myself and MANY others want to see.....

Ha, kind of ironic that using quote will work well for this one thing.  This is something to address but minor.

Typically (not here) the string is listed directly with a reply, and only the reply is posted. Typically (not here) the quote function is only to list the entry referenced (like yours above) directly in the reply.  Yes, it is good to limit the quote to just a single given previous post or the cascade can get absurd. It amazes me that people would just keep doing that cascade while watching the ad nauseum repeats fill a screen.  However, the situation here is different and somewhat counterproductive since seeing just one reference post REQUIRES the quote.  AND no other previous post can be seen while replying in any way.  Correspondence in a complicated or involved string, which is the interesting kind, could require notes before responding.

You referenced using 30K to 300K test pictures in a previous response (that I can't now see). I'll agree that 300K is a nice picture on a typical desk screen, but the 30K reference was almost like trying to hide an overly conservative limit. That's no bigger than the sample showing in an ad. I guarantee that those clicking on a 30K initial picture are nothing more than disappointed in the same size picture showing up. I'll run some test in the 300K range, a modest 4 to be specific to see if a total slightly over one meg goes. That's fairly minimal for usual accommodations. I'll experiment and let you know.

 

August 21, 2018 05:47 PM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

Originally Posted by Greg Shaffer


Actually what I previously said was when I entered a test ad with 10 images attached they varied from 95k to 300k. Dont understand why you can no longer see it since all I had to do was scroll up to see all of our previous messages all the way back to your original post. I know for a fact the 10 images totaled up to far beyond 1 meg.....probably close to 2.....

I can easily check again using larger images.....will do so.
I meant that I couldn't "now" see that post WHILE REPLYING.  The reference was to a post besides the quoted one.

Yes your previous entry says 95k to 300k,  I thought it was 30 to 300. I'll see at how some 100K +- look in an ad.

August 22, 2018 01:38 AM Forum: How to make AstroMart BETTER!! My idea is.....

Posting a classified is getting absurd

Posted By Neil Barnett

Originally Posted by Anacortes Telescopes
Our guys will address

Herb
WOW Herb, thanks!