Satellites : general discussion and musings

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Re: Satellites : general discussion and musings

Postby Peter on December 3rd, 2017, 11:08 pm

The_White_Lodge has a good point. Kepler and Newton can be criticized but more modern theories of people like Einstein seem to be largely fantasies and hypotheses. Historically man has changed his view of the violence of the universe imo depending on the current zeitgeist. Now of course, due to the space travel and satellite lie, it has to be a place of calm. The near universe at least. So we see the space station appearing still and peaceful and the old space shuttle gliding peacefully up to it to dock. In reality both would have to be traveling at tens of thousand of miles an hour and would have such energy that they could easily rip each other apart on contact. That is if they had magically survived being ripped apart on their own much earlier.
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Re: Satellites : general discussion and musings

Postby kickstones on February 1st, 2018, 11:43 am

Peter » December 3rd, 2017, 11:08 pm wrote:. Now of course, due to the space travel and satellite lie, it has to be a place of calm.



According to this drivel put out by a fantasist in the article below its maybe not going to be a place of calm in this part of the universe much longer.

The Magnetic Field Is Shifting. The Poles May Flip. This Could Get Bad. :o

The shield that protects the Earth from solar radiation is under attack from within.
01.26.2018 / By Alanna Mitchell

https://undark.org/article/books-alanna ... ng-magnet/

This essay is adapted from...

“The Spinning Magnet: The Electromagnetic Force That Created the Modern World — and Could Destroy It,” :o
by Alanna Mitchell, to be published on January 30

A few extracts.......

When next the poles change places, the consequences for the electrical and electronic infrastructure that runs civilization will be dire. :o

The question is when that will happen.

In the past few decades, geophysicists have tried to answer that question through satellite imagery and math. They have figured out how to peer deep inside the Earth, to the edge of the molten, metallic core where the magnetic field is continually being generated.

The latest satellite data, from the European Space Agency’s Swarm trio, :rolleyes: which began reporting in 2014, show that a battle is raging at the edge of the core. Like factions planning a coup, swirling clusters of molten iron and nickel are gathering strength and draining energy from the dipole.

Scientists can’t say for sure that is happening now ....


But they can say that the phenomenon is intensifying and that they can’t rule out the possibility that a reversal is beginning.

How bad could it be?

Scientists have never established a link between previous pole reversals and catastrophes like mass extinctions. But the world of today is not the world of 780,000 years ago, when the poles last reversed......

Add cosmic and ultraviolet radiation to this mix, and the consequences for life on Earth could be ruinous.

And the perils are not just biological...

Because grids are so tightly coupled with each other, failure would race across the globe, causing a domino run of blackouts that could last for decades.

No lights. No computers. No cellphones. Even flushing a toilet or filling a car’s gas tank would be impossible. And that’s just for starters....

And private satellite operators aren’t collating and sharing information about how their electronics are withstanding space radiation, a practice that could help everyone protect their gear. :)

It’s time to wake up to the dangers and start preparing.
:lol:
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Re: Satellites : general discussion and musings

Postby simonshack on February 1st, 2018, 10:55 pm

kickstones wrote:
And private satellite operators aren’t collating and sharing information about how their electronics are withstanding space radiation, a practice that could help everyone protect their gear. :)


Image
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Re: Satellites : general discussion and musings

Postby bongostaple on June 24th, 2018, 8:14 pm

Just saw this in the news. Apparently there could be many more Near Earth Objects than are officially recorded. No shit. The whole news 'story' appears to be aimed at getting people to shit themselves about being hit by one.

https://www.techtimes.com/articles/230984/20180623/there-could-be-thousands-of-unconfirmed-near-earth-objects-according-to-scientists.htm

I think there are probably a lot of NEOs that have been confirmed as man-made satellites, rather than identify them as lumps of rock. With reference to earlier discussions here, I would imagine many NEOs have been spotted and tracked, but not publically identified as anything until a satellite gets launched. Or a 'space station'. No problem, there are more than enough NEOs to go round without affecting the 'Armageddon' fear story.

[edited - typo]
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Re: Satellites : general discussion and musings

Postby Mansur on September 14th, 2018, 7:02 pm

Image

The photo out of the pre-satellite era and of the heyday of scientific popularization was allegedly made by a 2¼ hour exposure. (Taken from a book of mainstream scientist James Jeans, The Stars in their Courses, published about 1930.) The straight line as the description says is the trace of a falling star running through accidentally.

(Btw, without even the least expertise in photography, I don’t see —satellites or not— why do the countless modern time-lapse photos show no such lines.)

[I found the original book: https://www.questia.com/read/6795692/th ... ir-courses
The caption there runs as (I. table) :
"Norman Lockyer Observatory. The Rotating Dome of the Sky Each curved line records the apparent path of a single star in 2 1/4 hours. The straight line across the plate is a meteor-trail, made by a meteor (p. 66) which happened to dash through the earth's atmosphere while the plate was being exposed."
So maybe I am wrong and misdirected by a floppy translation. ]

*************
Admin notice (simon) : your above picture wasn't displaying (for some unknown reason), so I went to that URL, found it, and made a screenshot of it.
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Re: Satellites : general discussion and musings

Postby Mansur on September 16th, 2018, 7:18 pm

Thank you, Simon.

And I am sorry for the blunder. -- But now, quite contrarily to my intention that was when posting the picture, it seems to be a question of fakery.

(In the book (1931), the author is showing the universe surrounding us with the help of an imaginary rocket traveling through the spheres, -- “what we would see if we were there” as it were. -- But maybe it was the invention of the translation (1941) too…)
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Re: Satellites : general discussion and musings

Postby heniek1812 on September 18th, 2018, 9:21 am

Jonathan » November 1st, 2011, 12:49 pm wrote:This is only to further try to clarify my viewpoint, not meant as proof...

I was actually trying to create a picture which represents the true dimensions we are dealing with here.
And I might even succeed creating one of Earth with satellites orbits in its true dimensions relative to each other - and to the shadow Earth creates, projecting it onto the satellites orbits.

I failed to create a faithful representation of the size- and distance ratios of Earth and Sun.
This time not because of lack of skill, but because of the actual vast ratios.
The picture would need to be vast too - wide, especially.
It just would not fit on screen while actually showing any detail.
......
The values I used to calculate:
Sun's diameter: 1.4 Million Kilometer
Earths diameter: 12.700 Kilometer
Distance Sun - Earth: 150 Million Kilometer (slightly rounded up value of one AU)
Diameter of Basketball: 24 cm (derived from a circumference of about 75.4 cm)
The previously introduced value of 30 inches diameter for a Basketball was obviously not correct - that was its circumference ;) (for a standard NBA ball).


Ok, I am very late to this discussion but I noticed that over several comments no one calculated to the end the numbers that directly relate to why Jonathan gave up on making a scaled image of the situation.

I have been interested in Astronomy since I was a kid. After university it went by the wayside but the Moon and the stars at night continued to remind me that I liked them.

Ok, assuming that everything is in a straight line, Sun - Earth - geosat.

The angle that the Sun makes in the hypothetical field of view of the sky (180 degrees) is

arc tan(0.7*10^6/150*10^6) = 0.267 degrees ----> complete disk gives 0.534 degrees

Now the geosat is sitting behind the Earth and wants to see the Sun. Well to see it the Earth better make an angle in the field of view of the satellite that is LESS THAN 0.534 degree. So what is that angle ?

arc tan(0.6*10^3/35.8*10^3) = 0.96 degrees ----> complete disk gives 1.92 degrees

1) We are dealing with very small angles and HUGE distances. This is not going to look too informative if you try to show it in a visual. The numbers speak for themselves. The illusion being that we the ants on this huge Earth see a LARGE Sun in the sky and think "Wow, it is lighting everything !!!". Well that is an illusion if the Laws of Physics are as we have them and light travels in straight lines (Yes I know about the bending due to gravity , atmosphere .....).

2) Sun present to the geosat only 0.534 degrees of the field of view but the Earth blocks that with its 1.92 degrees.

So disregarding various spins, oscillation of the axis, orbits etc, on a straight line basis Earth blocks the rays of the Sun from the tiny geosat.

Sitting on this big sphere obscures certain realities of the dimensions we are dealing with and how they influence our perception.
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