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Foreign
2011-May-06, 09:17 AM
Hello everyone

please guide me in this 2 Qs:

1- Do we really see the setting or the mansions of the stars ( and not stars themselves )?

2- Is there fire-or something hot etc.. - under seas and oceans ?

Thanks

please simple answer for a layperson.

Strange
2011-May-06, 09:56 AM
1- Do we really see the setting or the mansions of the stars ( and not stars themselves )?

I'm not quite sure what you mean by this, but yes we see the stars themselves. (There may be a few exceptions, e.g. some stars are hidden by dust, say, and we only see their light indirectly.)


2- Is there fire-or something hot etc.. - under seas and oceans ?

Well, there are volcanoes and hydrothermal vents (http://en.wikipedia.org/wiki/Hydrothermal_vent). These are interesting because they support all sorts of specialised life - and there are some suggestions that they could be the locations where life first appeared.

Edit: and mid-ocean ridges (http://en.wikipedia.org/wiki/Mid-ocean_ridge) which are another place hot magma rises and forms new land.

astromark
2011-May-06, 10:29 AM
Hello everyone

please guide me in this 2 Qs:

1- Do we really see the setting or the mansions of the stars ( and not stars themselves )?

2- Is there fire-or something hot etc.. - under seas and oceans ?

Thanks

please simple answer for a layperson.

-------------------------------------------------------------------------------------------

I would describe myself as basic and simple... meaning that I am not complicated. So I will begin...

1/... The common use of the word 'mansions' is in direct reference to a grand house...

or some connection to where you are from ; In this subject use No but, Yes... As with the actual position of any star.

We see the light image that has reached us. As many stars are great distances from us.

The image point may not be actualy where it looks to be... but is close.

2/... The oceans of Earth do conceal some hot zones and rift valleys...

but most of it is just called the sea floor., and is just that.

Foreign
2011-May-06, 12:11 PM
Thanks very much

so, if i understood,
1- True ( we see the settings) but it's relatively not significant due to great distance from earth.

2- About that hot zones what is the average temp. there ? and under it what's there ? Is there water again or what ?

Actually this is amazing !

Strange
2011-May-06, 02:31 PM
2- About that hot zones what is the average temp. there ? and under it what's there ? Is there water again or what ?

At places magma emerges (ridges and volcanoes) the temperature is usually 700 C to 1300 C. The temperature of hydrothermal vents can be up to a few hundred C.

As for below these, there is the "crust" (solid outer layer of the earth) which is 10s of kilometers thick and underneath that the "mantle" part of which is molten (the magma).

Amber Robot
2011-May-06, 02:45 PM
Thanks very much

so, if i understood,
1- True ( we see the settings) but it's relatively not significant due to great distance from earth.


What do you mean by "settings"?

Foreign
2011-May-06, 04:18 PM
hello

I think it's the orbit, place or something like that- Ask the experts here !

Foreign
2011-May-06, 04:21 PM
At places magma emerges (ridges and volcanoes) the temperature is usually 700 C to 1300 C. The temperature of hydrothermal vents can be up to a few hundred C.

As for below these, there is the "crust" (solid outer layer of the earth) which is 10s of kilometers thick and underneath that the "mantle" part of which is molten (the magma).

Thanks- I have another question please. Is this mantle (or magma) is the origin of water on the earth today ?

Amber Robot
2011-May-06, 06:28 PM
hello

I think it's the orbit, place or something like that- Ask the experts here !

Arguably I am one of the experts here and I don't know what "settings" means in this context. I've not heard that term in any discussion of stars in astrophysical conversations.

schlaugh
2011-May-06, 06:57 PM
Foreign, are you referring to this? http://en.wikipedia.org/wiki/Twenty-eight_mansions

Foreign
2011-May-06, 07:15 PM
Hello

Sorry for the misunderstanding because i don't know your exact terms and no i don't know about 28 mansions .
Astromark understood me, that's what i meant:

As with the actual position of any star.

We see the light image that has reached us. As many stars are great distances from us.

The image point may not be actualy where it looks to be... but is close.

Now,
Is this mantle (or magma) is the origin of water on the earth today ? And Is there water that's more than all oceans.?

Thanks for any help

Strange
2011-May-06, 10:39 PM
Thanks- I have another question please. Is this mantle (or magma) is the origin of water on the earth today ?

No. I think pretty much all the water came from comets hitting the Earth shortly after it was created.

By chance, there is currently another thread about that: http://www.bautforum.com/showthread.php/115286-all-the-water-on-Earth-is-4.3-or-4.4-billion-years-old-really

astromark
2011-May-07, 01:52 AM
The surface of planet Earth can be complicated, but I will attempt to explain what I think you need to know...

I understand you might be that I am part Chines...

The planet has a thin crust beneath which molten hot lava also known as the Mantle is found.

Its in a liquid form of rock, but is NOT water. Its molten rock.

The inner core of this planet is under a great deal of pressure and is also very hot. It has a mostly iron content.

Back up to the surface there is some plate structures of large land masses and you could imagine they are being moved about by the molten lava (magma) below, which has movement due to tidal loadings and heat transference.
Magnetic fields of energy and that iron core all have rolls in this activity.

As parts of the crust are also torn and compressed by the movement of the Mantle structure.

Earths Oceans are flooding seven tenths of the surface area... Leaving just that three tenths for us to live on...

Some ocean trenches are deeper than the mountain ranges are high...

Earths gravity mass holds water down and under some of the depths chains of volcanic and fault structures do their best to disrupt our lives...

Fortunately they mostly fail. We, like maggots on meat... spreading like a cancer across the landscapes.... prevail, and we think we are important. Oops....I think I'm done...:razz:Mark Lee hopes to have helped...

John Jaksich
2011-May-07, 07:40 PM
Hello

Sorry for the misunderstanding because i don't know your exact terms and no i don't know about 28 mansions .
Astromark understood me, that's what i meant:


Now,
Is this mantle (or magma) is the origin of water on the earth today ? And Is there water that's more than all oceans.?

Thanks for any help

If I am not too late---the mansions that our friend is referring to is the bending of light due to "gravity". . . . e. g. as in the "star set in some particular portion of the sky(?)"---but is located (?) elsewhere. . . . ? if I am not mistaken

Jeff Root
2011-May-07, 08:24 PM
My guess is that by "mansion" he means "the place in which a
group of stars reside". I suspect that by "setting" he means the
"scene" or "place" where the stars are, rather than "going down
below the horizon".

But I still have no idea what he is asking.

A general textbook on Earth sciences and one on astronomy
would be far better sources of this kind of info than the Internet.
You can find such books at almost any used book store in the
entire world, at prices way below the prices when new.

-- Jeff, in Minneapolis

astromark
2011-May-07, 08:25 PM
Yes 'John'. Gravity is one of the reasons that a star may not be where its image shows it to be..
I avoided that direct observation because light refraction entering Earths atmosphere also distorts the light actual point image.
I think 'Foreign' has understood this.

and to 'Foreign' regarding the oceans.. No there is not a great reserve of water other than what we see as the oceans and what has been frozen and is locked as ice at the polar regions... and what is naturally in the atmosphere as cloud...