Safe Speed Forums

Completly non-car related stuff

Just thought that there would be parties present interested in commenting.

http://www.dailymail.co.uk/sciencetech/ ... mages.html

Doesnt it look diferent to "Our" side!! One comment suggested that this might be because the far side intercepts space trash that is heading towards the earth wheras this side is effectivly protected by the moons own bulk from said trash, And I think he may have a point.

It is amazingly diferent though. totally (erm) Alien in fact....

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"The road to a police state is paved with public safety legislation"

Lovely picture, Dusty. Thanks for posting it.

But it isn't the dark side, it is the far side. It gets as much exposure to sun light as the near side. And both sides are equally exposed to space trash so the number of impact craters on each side are very similar. The difference in appearance is due to a lot more volcanic features, the maria, on the near side. This is because - as lunar prospector measured with its gamma ray spectrometer - there are a lot more heat producing elements (potassium, uranium and thorium) in the crust on the near side driving volcanism a few billion years ago

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown

Of course I am aware that it is not the "Dark" side, I was just making the Pink Floyd refrence

However, your explanation is even more interesting. I would have thought that the Moon would be fairly homogenous geologically speaking. Diferences big enough to produce this level of efects are interesting to say the least.

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"The road to a police state is paved with public safety legislation"

It is obvious that Brian Cox was near a member of Pink Floyd or the Album wound never have had that title.



Interesting and as yet not fully explained. The prevailing hypothesis today is that the Earth–Moon system formed as a result of a giant impact: a Mars-sized body hit the nearly formed proto-Earth. So if the heat producing material was distributed uniformly around the crust of the earth then the chunk pulled away would have a lot more of it on one side than the other

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown

That makes sense.
Could the one-sided volcanism be due to the tidal effect of earth's gravity (more pull towards earth at the near side of the moon), so attracting heavier (i.e. more interesting) elements to the near side?
(PS: I'm guessing)

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Views expressed are personal opinions and are not necessarily shared by the Safe Speed campaign

Why is it that craters often appear convex in photos?

A mental/visual effect similar to the Necker cube exacerbated by composite picture being made up of images lit from different directions.

At a guess.

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Driving fast is for a particular time and place, I can do it I just only do it occasionally because I am a gentleman.
- James May

See also "Worms on Mars"

http://www.badastronomy.com/bad/misc/ho ... sworm.html

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"The road to a police state is paved with public safety legislation"

I wonder what subsequently happened to said Mars-sized body

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Only when ideology, prejudice and dogma are set aside does the truth emerge - Kepler

You certainly are. The only force that the earth exerts on the moon (and vice versa) is tidal. That means that the same force is exerted on both sides - pull on the near side, push on the far side as it were. Which is why we have two lunar tides per day, one directly under the moon and the other on the exact opposite side.

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown

The shadows help to confuse the eye, as in equal measure the image might be the reverse of the image we 'think' that it is. Our brain often decides what we ought to see and as long as it fits the pattern then we accept it. When it is in fact different, we are surprised, and then have to 'sort of' take a second look to observe 'properly,' to see what we missed, having now established that there was an error.
HTH.
A wonderful image.

So tell me then if the Earth pulls, then I assume, (as it makes sense to me) that the pull that the Earth has on objects beyond the moon help to cause the moon to act as a buffer as it were. That right ?

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Safe Speed for Intelligent Road Safety through proper research, experience & guidance.

Walking to work so brief, sorry.

Look up Lagrange points.

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Driving fast is for a particular time and place, I can do it I just only do it occasionally because I am a gentleman.
- James May

OK then so once an object passed through the Lagrange Point/s then it falls into the Moon or whatever, from its gravitational pull, (if said object happens to have one) - the Moon being lower in gravity than earth (so the moon's gravity is much less than the earth's gravity, 83.3% (or 5/6) less to be exact.) ?

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Safe Speed for Intelligent Road Safety through proper research, experience & guidance.

Didn't they re-name it SNICKERS? Oh, that was MARATHON bars wasn't it!

Isn't it time they re-ran those programs with Dr.Carl Sagan? And put "The Sky at Night" on at a more reasonable hour?
And finally from the sound of it, Newtons third law of motion needs more media exposure than it gets these days!

Our view of the moon tonight was poor despite it's closer proximity - layers of thin cloud just got more and more intrusive, and by 8.00pm all you could see was a pale light in the cloud!
Some people seemed to think that because it was CLOSER, the moon would have more effect on the earth.
Of course in fact, if you tie a weight on a length of string and whirl it around you, it does not get heavier if you shorten the string!

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Time to take responsibility for our actions.. and don't be afraid of speaking out!

But the Moon isn't attached to the Earth by a piece of string (in which the force is not related to its length). It is attached by gravity which is an inverse square law force - F = G*m1*m2/r^2 The closer two bodies are together the greater the force of attraction between them. Which is why lunar tides are larger than solar tides despite the much greater mass of the sun.

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown

Shh!! You are playing into the hands of the alarmists who think that the proximity of the moon is causing all these unnatural events we have been experiencing lately - something governments and scientists have been keen to deny!

However, if you whirl an object on a really short string, it does appear heavier than if you have a really long string.

Waits for posters to go out into the garden to try it!

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Time to take responsibility for our actions.. and don't be afraid of speaking out!

You are trying to whirl me up aren't you, Ern?

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown

I thought that it was a "stretch" - the difference between the gravitational force on the nearside versus the far side?

mb

About two posts ago - although not you in person - I know your credentials in this matter!

Just waiting for somebody to pick up on the length of string apparently affecting the weight now!

Have you ever met Patrick Moore?
He doesn't speak as fast as it seems he does when you speak to him in person!

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Time to take responsibility for our actions.. and don't be afraid of speaking out!

I was referring to the difference between the force at each extremity and the force at the centre. Positive - pull - nearer the Moon. Negative - push - away from the Moon. Your description is probably clearer

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When I see an adult on a bicycle, I do not despair for the future of the human race. H.G. Wells
When I see a youth in a motor car I do d.c.brown