Space Stations: Past, Present, And Future

[Cosmick]

If you mine the Moon you would decrease its mass and maybe increase its orbit

 

 

[Phil Perry]

If you mine the Moon you would decrease its mass and maybe increase its orbit

The Moon is currently moving away from the Earth at a rate of 12.5 Millimetres per year,. . .so we have not got that long until it's gravity no longer affects the tides on Earth.

 

After that, the oceanic currents will cease, and Earth will no longer support life as we know it.. . .it's not that bad though,. . we, and our great great great great grandchildren will be fine. . .. ( so long as they convert to Islam of course. . . )

 

 

[Old Koreelah]

Phil if they convert to that medieval religion it won't matter. Life won't be worth living any more.

 

 

[pmccarthy]

12.5mm might not seem much but when your waistline expands by that each year it soon adds up.

 

 

[Bruce]

Yes, apparently the law of conservation of angular momentum demands that the moon move further away to compensate for the earth slowing down.

 

But how does the moon know that the earth has slowed down? I really should understand this, but sorry I don't.

 

 

[Marty_d]

12.5mm might not seem much but when your waistline expands by that each year it soon adds up.

If your waistline has a diameter of 768,800km to start with, it probably wouldn't bother you that much.

 

 

[spacesailor]

The mass of the Earth is increasing, it may match the 12.5mm."

 

( watch the night sky & see all those streaks of light "shooting-stars" Falling on to US).

 

spacesailor

 

 

[octave]

The mass of the Earth is increasing, it may match the 12.5mm."( watch the night sky & see all those streaks of light "shooting-stars" Falling on to US).

 

spacesailor

It is an interesting question as to whether the Earth is gaining or losing mass. The increase in mass from meteorites is counteracted by two things radioactive decay ie mass becoming energy and also loss of hydrogen and other gasses from the atmosphere.

 

Is Earth Gaining Mass Or Losing Mass?

 

Is the Earth gaining or losing mass over time?

 

 

[nomadpete]

I tried to read your links....

 

So, nobody really knows the answer.

 

For all we know these mass change influences might be a bigger worry than anthropogenic climate change.

 

 

[octave]

I tried to read your links....So, nobody really knows the answer.

 

For all we know these mass change influences might be a bigger worry than anthropogenic climate change.

I think the answer is that it is either gaining a small amount or losing a small amount and therefore probably not worth lying awake at night worrying about.

 

"So it’s most likely that Earth is losing a bit of mass each year, but if the rate of meteors is on the higher end of estimates, then it could be gaining a bit of mass."

 

"The answer is we really don't know, but as we seem to have more accurate figures on mass loss than mass gain, it seems we can have more confidence that Earth has a net mass loss".

 

 

[spacesailor]

WELL

 

I think if it's losing, A couple of cubic kilometres of Hydrogen & Helium,, compererd to a couple of cubit kilometres of space-dirt (shooting star-dust, it would be a BIG exchange,!.

 

spacesailor

 

 

[octave]

WELLI think if it's losing, A couple of cubic kilometres of Hydrogen & Helium,, compererd to a couple of cubit kilometres of space-dirt (shooting star-dust, it would be a BIG exchange,!.

 

spacesailor

You should pass on your high quality research to NASA although you may have to show your workings out!l

 

 

[Marty_d]

A couple of cubic km of space-dirt is a whole heap of very large meteorites.

 

I'd suggest that if that were the case we'd have bigger worries than the Earth's expanding waistline, eg copping another one like the one that happened about 65 million years ago.

 

 

[nomadpete]

That's why we don't need to worry about anthropogenic climate change!

 

 

[pmccarthy]

At least falling space dirt is real.

 

 

[Old Koreelah]

At least falling space dirt is real.

...and that's when the fight started, again.

 

 

[willedoo]

This is a 5 minute video of a 2014 Soyuz landing.

 

 

 

 

[willedoo]

An interesting article about the soon to be space programmes:

 

https://www.gizmodo.com.au/2019/12/the-space-news-were-excited-about-in-2020/

 

Just one of the developments is SpaceX's planned 24 Starlink missions next year, bringing the total Starlink satellite tally to around 1,440, up from the current 120.

 

 Starlink satellites, May, 2019.

 

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[spacesailor]

To prove my point l,ve Never seen an,

 

ARCHAEOLOGICAL DIG,  AT GROUND LEVEL .

 

Some are so deep, you would need transport down to the working face.

 

See the Egyptian exploration sites.

 

spacesailor

 

 

[pmccarthy]

So we are threatened by Earth Level Change! The earth has risen on average a metre or two since Roman times and a lot more since the dinosaurs. We are all doomed. It was all stable until we humans started mining, then we mucked up the balance and the soil started to rise. The stone, bronze and iron ages were all about getting minerals, but we didn’t know the trouble we were causing. The aborigines only mined ochre and flint so the soil didn’t rise much in Australia.

 

 

[onetrack]

In the City of Long Beach, California, the Americans sucked so much oil out of the the giant Wilmington Oil Field, over most of the 20th century, that large areas of Long Beach subsided - up to 8.8 metres (29 feet), in some places.

 

The damage bill ran into the hundreds of millions of dollars. Wharves sank into the sea, rail lines and pipelines became displaced and cracked, and became unusable, buildings and whole streets were displaced or cracked.

 

95 oil wells were severely damaged, or completely sheared off by underground slippage, resulting in major oil well repair work.

 

http://www.longbeach.gov/energyresources/about-us/oil/subsidence/

 

In the San Joaquin Valley, large areas of serious subsidence (up to 9.15M or 30 feet) has resulted from excessive groundwater draw.

 

https://www.kcet.org/history-society/incredibly-sinking-state-the-lowdown-on-subsidence

 

 

[willedoo]

This was another good one - the Lake Peigneur drilling accident in Louisiana.

 

 

 

 

[onetrack]

Yes, I remember reading about the Lake Peigneur drilling disaster in the Readers Digest in the late 1980's. I couldn't believe anyone could be so stupid, to drill into a working salt mine under a lake.

 

 

[Phil Perry]

Here is a nice, relaxing multiple exposure shot of the Flaming Star Nebula. taken by my mate Rob Greaves, from his backyard in late december 2019.

 

He apologised as it is slightly blurred.  Not bad for an amateur, using el- cheapo gear though. . .

 

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[facthunter]

Most of Newcastle, NSW, has restrictions on buildings and regular subsidence issues (roads and buildings)  due earlier below ground coal mining. Damage during the earthquake there was amplified by the underground extractions.  Nev