relationship between the planets and earth

[neomortalgirl]

How much is known about the effect the other planets have on the cycles on earth. <br /><br />We know that the moon effects our tides and the sun obviously controls us by the amount of light we recieve. But i am curious to know if there has been any connection with other planets changing the magnetic field of the earth and perhaps causing minor cycles to occur.<br /><br /> Such as the recent debate about global warming which is obviously just evidence of one of earth's cycles at work.<br /><br />I get into Ancient astrnomy it amazes me how much they relyed on the planets cycles did they really know something we haven't discovered yet?

 

[yevaud]

Very tiny, I assure you. The gravitational influence of the other planets is miniscule at best.<br /><br />Remember several years ago that people were obsessing about "Szyzgy," e.g. four outer planets and Earth all (nearly) lining up? The possibility for global disaster?<br /><br />End result: no effect whatsoever. <div class="Discussion_UserSignature"> <p><em>Differential Diagnosis:  </em>"<strong><em>I am both amused and annoyed that you think I should be less stubborn than you are</em></strong>."<br /> </p> </div>

 

[tony873004]

<i>Such as the recent debate about global warming which is obviously just evidence of one of earth's cycles at work. </i><br />I wouldn't call it obvious. That's what the debate is all about.<br /><br />Jupiter's influence causes Earth's eccentricity to change over periods of about 400,000 years. Read more about it by Googling for Milankovich cycles. This cycle is theorized to be tied to the periods of ice ages and inter-glacial periods. At the moment, Earth's orbit is getting rounder and rounder with time. The rounder the orbit, the less solar flux we receive over the course of a year.

 

[alokmohan]

"Szyzgy .Something new.I never heard it.Can you give the link?

 

[alokmohan]

Google could not say.

 

[alokmohan]

Google could not say.

 

[yevaud]

The odd thing is, I can't find a link directly to it. <br /><br />The term was invented by Emmanual Velikovsky to describe the occurrance of several planets all lining up and the gravitational effects thereof. <div class="Discussion_UserSignature"> <p><em>Differential Diagnosis:  </em>"<strong><em>I am both amused and annoyed that you think I should be less stubborn than you are</em></strong>."<br /> </p> </div>

 

[emperor_of_localgroup]

Relationships between planets?<br />Our earth may be saying to other planets , "Dont hate me because I'm beautiful".<br />On a serious note, if a planet is suddenly missing, will our solar system's life go on as usual? It can be calculated mathematically with ease. I'm not sure if it's already done. <div class="Discussion_UserSignature"> <font size="2" color="#ff0000"><strong>Earth is Boring</strong></font> </div>

 

[brellis]

There is a planet missing, between Mars and Jupiter. What is now the asteroid belt are pieces of what coulda-shoulda been the fifth rock from the sun.<br /><br />On the scale of billions of years, it seems there has been a certain plucky quality to our home planet, in its relationship with Jupiter. Thanks to Jupiter, the Shoemaker-Levy comet never managed to find its way into an earth-endangering trajectory.<br /><br />I wonder if there could be a KBO big enough to have a serious impact on planetary orbits should it somehow get headed in towards the sun. <div class="Discussion_UserSignature"> <p><font size="2" color="#ff0000"><em><strong>I'm a recovering optimist - things could be better.</strong></em></font> </p> </div>

 

[MeteorWayne]

By this time in the evolution of the solar system, if a planet suddenly disappeared life might just go on as usual. <br />However, if it was Jupiter, some bad things could happen since so much of the dynamics of the solar system is controlled by it's mass. <br />Orbits in the asteroid belt might become unstable, causing them to spread around the solar system. If one hit us, that could be VERY bad <img src="/images/icons/wink.gif" /><br /><br />Comets orbits would be altered as well. There's a whole class of comets called Jupiter family comets, between 20 and 100 with diameters /> 1 km.<br />These have periods < 20 years (typicall about 6) with aphelia near Jupiter. Without Jupiter's influence, those orbits could change. If one of them hit us, BAD again <img src="/images/icons/wink.gif" /> However, if it just missed, it might be very spectacular!!<br /><br />MW <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[why06]

Gravity Simulator<br /><br />Contains premade simulations of the orbits of the planets. Notice there is a glitch though that increase the gravity of an object as you increase the rate of time. So keep it going slow and you should be alright. <div class="Discussion_UserSignature"> <div>________________________________________ <br /></div><div><ul><li><font color="#008000"><em>your move...</em></font></li></ul></div> </div>

 

[alokmohan]

Good,simulationis always good.

 

[nexium]

If a 2.7 mile asteroid missed Earth's surface by 250 miles, it would appear to be about as large as the first quarter Moon, for a few minutes over a path about one thousand miles long. The mass is too low to produce a large tide or other effects, but the asteroid would possibly disintigrate due to the tidal stress on the asteroid. The asteroid peices would not scatter even one mile during the close approach, unless the miss distance was 50 miles or less. Neil

 

[MeteorWayne]

You are absolutely correct. Even a miss of 250 miles (400 km) while visually spectacular would have little effect down here. And for anything over ~>100 km altitude, the atmosphere isn't a factor. So that pass will have no effect.<br /><br />However, if it is in (4 two letter "i" words in a row <img src="/images/icons/smile.gif" /> ) an orbit that comes near the earth again, should it shatter, we might well be in some danger. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[dragon04]

The "other planets" have a small effect on us. But we're talking about an entire system that is dominated overwhelmingly by the Sun and its gravity.<br /><br />Each body in our solar system affects one another in a manner described by the inverse square law of the effects of gravity over distance.<br /><br />IOW, the massive Sun at 1 AU has a much more profound effect on Earth than relatively small Jupiter does at a little over 5 AU.<br /><br />Jupiter is important because its gravity "keeps the asteroid belt in line" and is more likely to capture incoming objects.<br /><br />Our 24 hour rotational period is due to a couple things. One being the distance from the sun, but more importantly because we have a relatively large moon that orbits us.<br /><br />We could use Mars and Earth to illustrate this. The Martian "day" isn't all that much longer than the "Earth Day". So the planets don't have a big influence on how long our comparative days are.<br /><br /><font color="yellow">Such as the recent debate about global warming which is obviously just evidence of one of earth's cycles at work.</font><br /><br />That really cant be explained by planetary interaction between us and our neighbors in the Solar System. It's more of a local phenomenon and a result of our Sun getting "hotter" with every hydrogen atom it fuses.<br /><br />Our own gravity is very greedy. It only lets the lightest of atoms escape the atmosphere. As an example, volcanic activity that makes it to Earth's surface releases gases that unless broken down are too heavy to escape gravity.<br /><br />In addition, every second that I spend typing this response, the Sun is becoming more luminous. It's surface is actually cooling, but it's getting bigger and delivering more energy into our atmosphere.<br /><br />Ancient astronomers and cultures didn't rely on the planets, but rather the Sun and the Moon. The Sun told them when to plant crops and the Moon told them when to harvest them.<br /><br />The Ancient Egyptians w <div class="Discussion_UserSignature"> <em>"2012.. Year of the Dragon!! Get on the Dragon Wagon!".</em> </div>

 

[nexium]

The Sun is getting, bigger, more luminous, hotter, but the photosphere is cooling. Perhaps short term and/or minutely over the next billion years. Let's not alarm people about changes so small, these conclusions are subject to reasonable doubt. Neil

 

[qso1]

Yevaud:<br />Remember several years ago that people were obsessing about "Szyzgy," e.g. four outer planets and Earth all (nearly) lining up? The possibility for global disaster?<br /><br />Me:<br />This actually occured twice. In the late 1970s, there were predictions that a major earthquake would cause California to fall into the Pacific ocean. The date this was to occur was 1982. The cause was said to be the lineup of planets on one side of the sun. And of course, it didn't happen.<br /><br />If the planets could have this kind of effect on earth cycles, the moons effects should have caused California to jump and somersault into the sea.<br /><br />The prediction your referring to was made in the late 1990s with regard to much the same thing. When I saw that one, I knew the planets could not line up on one side of the sun in less than 20 years so I looked at the planets positions in Starry Night for 200 or 2001 IIRC.<br /><br />There was a lineup alright..they were widely spaced within a sphere of 180 degrees. This would have little if any influence on earthly cycles.<br /><br />As you mentioned...very thin. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>