View Full Version : Earth microgravity changed by losing mass of beyond earth rocket launches?

2018-Sep-07, 03:23 PM
I was wondering about all of the rocket launches that have been going on over the last 60 years. Some of these launches go out of Earth orbit and do not come / fall back to Earth. In a certain way Earth is loosing mass and that could effect Earths microgravity.
What happens if these launches continue for centuries: doesn't that on the long term, Iím thinking thousands of years here, have an effect on the Earths rotation and the pull to our orbiting moon and our position in the solar system? Does the Earth magnetic field change of we keep remove metals that do not return to Earth? What about all orbiting objects that throw a minute shadow on our Earths atmosphere - does that have any influences? Are we aware? Do we consider the long term effects?
Even a micro-shift could be the start of an avalanche of future things to happen...?

2018-Sep-07, 04:23 PM
There are factors that cause the Earth lose mass and others that cause it to gain mass

By far the biggest contributor to the world's mass is the 40,000 tonnes of dust that is falling from space to Earth


They go on to conclude:

taking into account the gains and the losses, Dr Smith reckons the Earth is getting about 50,000 tonnes lighter a year, which is just less than half the gross weight of the Costa Concordia, the Italian cruise liner, that ran aground recently.
Clearly, compared to the immense size of the world, this is a tiny difference, a loss of just 0.000000000000001%.

2018-Sep-08, 12:05 AM
So in other words, yes, it loses mass due to rocket launches, but those losses are completely inconsequential compared to other causes of gain and loss, which in turn are inconsequential compared to the mass of the earth.

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