Planetary effect on Earth

[suntrack2]

The planets are cause for the verious changes and verious effects on earth
so far the calamities which are largely effects on the parts of earth, their gravitational pool,

their in all effect falling on earth, does it make any sense?
some people are telling that the tsunami like event are the cause of gravitational pool by sun and moon with the earth, is it meaningful?

the la nina, the el nino, and no. of such events are done with earth but whether in addition to this the planets of the sky cause any sort of hazard with the earth, or we just take lightly the planets so far our existence on earth or earth's existence is concern?

discuss


sunil.

[Sp1ke]

Assuming I've interpreted your question correctly, Suntrack, I would say that the gravitational effects of the other planets are insignificant and are completely overshadowed by those of the sun and the moon.

Even when all the planets are almost in a straight line, as happens very occasionally, they still do not exert a significant gravitational attraction on the earth so they aren't to blame for tsunamis, el Nino or any other local effects.

[Matthew]

And tsunami's aren't caused suddly by the moon and the sun lining up. If they were coastal areas would be inhospitable as there would be a high occurence of tsunamis. A tsunami is caused by a sudden shift of a tetonic plate or a landslide.

[suntrack2]

thank you mathew, for the answer, earth itself responsible for such hazards and no other outer effect is possible,
is there a possibility of the dislocation of the earth's gravitational speed and earth's own standing point? it will possible when all plates push each other.
There is a common phenomena of full moon and the zero moon in the sky to effect on the earth's nature. if the shifting of gravity by the other objects of the sky would it effect or affect.

[Sp1ke]

You don't need to worry about plate tectonics altering earth's orbit or gravity. The small movements of the earth's crust are insignificant as far as the centre of gravity of the planet is concerned.

And the full and new moon is only caused by the changing angle between the earth, moon and sun and has no gravitational effect. The slight increase in tidal flow caused by spring tides and neap tides is because the moon is slightly nearer/further from earth but, again, this is not significant on a planetary scale.

[GOURDHEAD]

When the Earth moon and sun are in alignment with the moon at perigee and the Earth at perihelion, a rare occurrence no doubt, the gravitational pull from the moon and sun will be ever so slightly larger than otherwise. This could provide the slight amount of extra force required to overcome some friction threshold thus allowing a sudden movement of a plate up to tens of meters. If this happens at oceanic plate borders, a tsunami is very likely.

[Matthew]

Yes but Gourdhead that would be only the "last straw". If the extra little bit of gravity would only be enough to set off something that would happen anyway.

Though I am still doubtful that it would be enough force to shift enough landmass. Technically it would lessen the load on the land mass. As there would be a gravitational acceleration downward (to the earth of 9.8 m/s/s but taken of that would be a tiny acceleration upward. Which would decrease the wieght of landmass.

[suntrack2]

dear mathew, are there any incidents happened that any planet or planets who lost their own gravity upto the very lower quantum, when we say the specific planets are having low gravity, if earth lost gravity upto the lower side through which cause we can say the earth lost its gravity for a while or say for remaining more period, is this logic is true?

[Hen3ry]

I'll bet we could find statistics that show more earthquakes happen around Full Moon and New moon than at others times in the Moons orbit...

[suntrack2]

that's fine Henry, you have accepted this concept?

[Duane]

Originally posted by Hen3ry@Feb 15 2005, 04:17 PM
I'll bet we could find statistics that show more earthquakes happen around Full Moon and New moon than at others times in the Moons orbit...

You'ld lose the bet. The amount of light falling on the moon will have no affect on the Earth. Even the eccentricity of the lunar orbit will have no effect--the Moon is just too small.

[Hen3ry]

Originally posted by Duane@Feb 17 2005, 11:53 AM

You'ld lose the bet. The amount of light falling on the moon will have no affect on the Earth.

Who's talking about light?
It's a short trip to the understanding of what tidal forces are.
Bet won again...