Thread: Points to ponder

Originally Posted by SKkin

So what caused the warming 10,000 years ago?

Not what's causing it now

Originally Posted by jabir

Not true
.I looked and could not see the circle or the arrow

Originally Posted by Buckaroo Banzai

I looked and could not see the circle or the arrow

Yeah, because they're out of your vision's range.
Consider, too, that the photo was sent to earth over a billion years ago, so the arrow and circle may have drifted off somewhat since then.

Originally Posted by Maanaam

Yeah, because they're out of your vision's range.
Consider, too, that the photo was sent to earth over a billion years ago, so the arrow and circle may have drifted off somewhat since then.

That's right he didn't read the text, can only see what's inside the circle. Hubble could see the arrow no problem.

Originally Posted by Maanaam

Yeah, because they're out of your vision's range.
Consider, too, that the photo was sent to earth over a billion years ago, so the arrow and circle may have drifted off somewhat since then.

ohhh, so I have being looking at the wrong place!! Ok tonight I will look for it again, and I don't care if it takes me all night, I am finding that damn yellow circle !!!

If you get drunk enough, miss your mouth and hit your eye with that bottle, your wish may come true !

Originally Posted by Latindancer

If you get drunk enough, miss your mouth and hit your eyes with the porridge bowl, your lids may glue together

...household hint...

Originally Posted by Buckaroo Banzai

Not what's causing it now

Maybe...but also may be influenced by this:

Originally Posted by jabir

which also suggests they are cyclical.

Possibly more influence than some are letting on. IMO...

Originally Posted by jabir

Light travels 91m miles from the sun, and your shadow deprives it from reaching the ground in the last few feet!

FN light! sticking its nose into everything, travels 91 million miles just to deprive my shadow from reaching his full potential,
You don't see my shadow doing the same thing,

Light is rayciss!

Originally Posted by jabir

I can relate.
Though, it's a double-edged sword that one. I think Buriramboy and Foolbarf are dumb, so does that make them smart and me dumb?
(Don't answer, Cyrille...there'll be a huge irony in your answer if it's typical of your posts.

Jupiter doesn't orbit the sun, and don't let anyone tell you otherwise.

Jupiter is so huge, with 2.5 times the mass of all the other planets in the solar system combined, that the centre of gravity between it and the sun doesn't actually reside within the sun, but at a point in space just above the sun's surface. That's what it orbits.

Here's how it works. When a small object orbits a bigger object, the smaller one doesn't really travel in a perfect circle around the larger one. Rather, both objects orbit a combined centre of gravity.

In situations we're familiar with — like Earth orbiting the much-larger sun — the centre of gravity resides so close to the centre of the larger object that the impact of this phenomenon is negligible. The bigger object doesn't seem to move, and the smaller one draws a circle around it.

But reality is always more complicated. For example: When the ISS orbits the Earth, both the Earth and the space station orbit their combined centre of gravity. But that centre of gravity is so absurdly close to the centre of the Earth that the planet's motion around the point is impossible to spot, so that the ISS makes a near-perfect circle around the whole planet.

The same holds when most planets orbit the sun, which is so much larger than them that their centres of mass with the sun all lie deep within the sun.

Not so with Jupiter, which is so big that its centre of mass with the sun actually lies 1.07 solar radii from the middle of the sun, or 7% of a sun-radius above the sun's surface. Both the Sun and Jupiter orbit around that point in space.

Jupiter doesn't orbit the sun.

Originally Posted by Texpat

Light is rayciss!

He Tex

Have you being drinking?
"Rayciss" LOL
I wish i was .Wife drop me off at home and left taking the keys with her.Hanging out by the koi pond 100 degree heat, a frige full of Leo on the other side of the door and i cant get to it
Grrrtr
But my shadow is here ,loyal always close by, not like that raycist pick Light always running all over the place!!
Haaa! I just killed a fly.
,one down, a million to go.

Serial loser, pissed off with the world, someone got one over you so you prefer Nature over the luxuries you take for granted?

You could go join this guy in Farashband, Iran, who has not bathed or showered in over 60 years, and claims cleanliness makes him sick.

Amou Haji lives a less than normal lifestyle, and at 80 years old probably not the most healthy lifestyle, but he’s made it this far and something must be working for him.




His most prized possession is a steel pipe with which he smokes animal dung, while his diet consists mainly of decaying animals he finds, usually rotten porcupine meat.



He has lived this way for over 60 years, ever since an emotional setback in his 20s.



He cuts and trims his hair by burning it over a fire, and lives a dirty but simple life which blends in with his surroundings.

Originally Posted by jabir

Jupiter doesn't orbit the sun

Technically, nothing orbits the center of anything because it is impossible for any two things to be perfectly identical -- quark level differences -- and those are only what humans are capable of measuring currently.

Earth doesn't orbit the center of the sun either. Which raises another question. To what degree can we accurately determine the center?
Angstrom units?

Originally Posted by jabir

Jupiter is so huge, with 2.5 times the mass of all the other planets in the solar system combined, that the centre of gravity between it and the sun doesn't actually reside within the sun, but at a point in space just above the sun's surface. That's what it orbits.

That I can get my head around.

Originally Posted by jabir

When the ISS orbits the Earth, both the Earth and the space station orbit their combined centre of gravity. But that centre of gravity is so absurdly close to the centre of the Earth that the planet's motion around the point is impossible to spot, so that the ISS makes a near-perfect circle around the whole planet.

This, not so much. I'm trying to reconcile it with earth's trajectory which didn't change after the ISS was launched. If Earth's orbit around the sun didn't alter, how could the Earth be orbiting the ISS simultaneously.
Of course I'm thinking in a mindset that visualises, say, a man literally running rings around a slower runner. The slower runner keeps on running towards the end of the circular track with the fast guy circling him, round and round. A graph of both their trajectories would show the slow guy's circle and the fast guy's stretched spiral.
A shift in POV is needed in me, I think.

Originally Posted by Takeovers

The Earth wobbles around

the cause of texpat wobbling around is alcohol

Originally Posted by baldrick

the cause of texpat wobbling around is alcohol

...and probably a low center of gravity...

Originally Posted by Takeovers

When two bodys rotate around each other they always both rotate around their common center of mass.

I get that. What I'm struggling with is the assertion that the Earth is rotating around the ISS, albeit the CoG is effectively at Earth's core, whilst maintaining it's current trajectory. I understand that that "orbit" is negligable, however it implies that each and every satelite launched to orbit Earth changes Earth's trajectory, no matter how infinitessimally.

Originally Posted by Texpat

Technically, nothing orbits the center of anything because it is impossible for any two things to be perfectly identical -- quark level differences -- and those are only what humans are capable of measuring currently.

Earth doesn't orbit the center of the sun either. Which raises another question. To what degree can we accurately determine the center?
Angstrom units?

We don't need to determine the centre of the sun or the masses, since the principle as explained doesn't allow any of the planets to orbit the precise centre of the sun, or ftm any object to orbit the precise centre of any other object.

But all of the planets orbit a point within the sun, and therefore can be said to orbit the sun, except Jupiter.

Point to ponder: In the old days, the early cars had the hinge for the front door on the pillar behind the driver/front passenger, opening "backwards". This seems to be an easier way to get in and out of the car. Why did it change?
(Was watching Highwaymen, a Bonnie and Clyde movie).

Originally Posted by Maanaam

I get that. What I'm struggling with is the assertion that the Earth is rotating around the ISS, albeit the CoG is effectively at Earth's core, whilst maintaining it's current trajectory. I understand that that "orbit" is negligable, however it implies that each and every satelite launched to orbit Earth changes Earth's trajectory, no matter how infinitessimally.

Clearly, and to illustrate that, when a rocket uses a planet or the moon to boost its trajectory it does affect the orbit of the larger object. Can't remember the numbers, but it was estimated that when one of the explorers used Jupiter to boost speed it affected the giant's own orbit by something like 2 feet every x trillion years.