earth's gravitational pull

[Ankit Gupta]

In a science fiction show they were telling that due to space dust earth's mass increases with millions of ton per day , is it real ?

[imatfaal]

In a science fiction show they were telling that due to space dust earth's mass increases with millions of ton per day , is it real ?

My memory is that is in the order of 100 tonnes per day - will have a look for confirmation

[Ankit Gupta]

My memory is that is in the order of 100 tonnes per day - will have a look for confirmation

now comes the main question , if this so then gravitational force on earth due to sun and on moon due to earth will increase as gravitational force is directly proportional to masses of bodies and hence will the distance between sun and earth,and earth and moon will not decrease and we are going closer to them day by day.

 

 

And if this not change then which thing is going to change.

[imatfaal]

now comes the main question , if this so then gravitational force on earth due to sun and on moon due to earth will increase as gravitational force is directly proportional to masses of bodies and hence will the distance between sun and earth,and earth and moon will not decrease and we are going closer to them day by day.

 

 

And if this not change then which thing is going to change.

 

 

Do some basic maths - orders of magnitude will do.

 

Also it is not stated whether the earth loses mass through other ways - gas leaking from top of atmosphere for example. The sun blows away vast amounts of mass per second.

[Acme]

now comes the main question , if this so then gravitational force on earth due to sun and on moon due to earth will increase as gravitational force is directly proportional to masses of bodies and hence will the distance between sun and earth,and earth and moon will not decrease and we are going closer to them day by day.

 

 

And if this not change then which thing is going to change.

To your first question, the nearest thing to a figure with 'million' in it that I could find is 1 million grams per year, or about 1000 tons/year. >> http://wiki.answers.com/Q/How_much_space_dust_falls_to_Earth_each_year#slide=2&article=How_much_space_dust_falls_to_Earth_each_year

 

Other estimates vary. This 2006 article puts the estimate @ 40,000 tons/year. >> http://www.universetoday.com/443/constant-rain-of-space-dust-adds-up/#ixzz2zuvM8sbC

 

...In the current issue of Science, the scientists from New York and Bremerhaven for the first time present chronologically resolved measurements of the 3He and 4He flux of interplanetary and terrestrial dust particles preserved in the snow of the Antarctic. According to current estimates, about 40,000 tons of extraterrestrial matter hit the Earth every year. ...

As to your above question on Earth/Sun and Earth/Moon distance, the Moon is moving away from Earth and the Earth is moving away from the Sun. The space dust accumulation is too small to appreciably increase Earth's mass in regard to its gravitational attraction to the Sun & Moon.

 

Earth/Sun distance increasing: >> http://www.newscientist.com/article/dn17228-why-is-the-earth-moving-away-from-the-sun.html#.U1qQ140U9LM

...Having such a precise yardstick allowed Russian dynamicists Gregoriy A. Krasinsky and Victor A. Brumberg to calculate, in 2004, that the sun and Earth are gradually moving apart. It's not much just 15 cm per year but since that's 100 times greater than the measurement error, something must really be pushing Earth outward. But what?

 

One idea is that the Sun is losing enough mass, via fusion and the solar wind, to gradually be losing its gravitational grip (see Astronomical unit may need to be redefined). Other possible explanations include a change in the gravitational constant G, the effects of cosmic expansion, and even the influence of dark matter. None have proved satisfactory. ...

Earth/Moon distance increasing: >> (same source)

... But Takaho Miura of Hirosaki University in Japan and three colleagues think they have the answer. In an article submitted to the European journal Astronomy & Astrophysics, they argue that the sun and Earth are literally pushing each other away due to their tidal interaction.

 

It's the same process that's gradually driving the moon's orbit outward: Tides raised by the moon in our oceans are gradually transferring Earth's rotational energy to lunar motion. As a consequence, each year the moon's orbit expands by about 4 cm and Earth's rotation slows by 0.000017 second. ...