200 days to go to planet Mars

Quote from: Heiwa on July 31, 2022, 11:18:35 AM

You are just jealous.

Of your inability to understand how rocket work?
Or that your model of the universe has been abandoned about 400 years?

Read https://forgottenbooks.com/en/readbook/TheEarthStandsFast_10493726#5 and tell me what you think.

Read https://forgottenbooks.com/en/readbook/TheEarthStandsFast_10493726#5 and tell me what you think.

Published 1868
Remember when I said you where stuck 500 years ago. Well this ancient book was out of date on its first print by about 300 years.

Quote from: Heiwa on July 31, 2022, 12:08:39 PM

Read https://forgottenbooks.com/en/readbook/TheEarthStandsFast_10493726#5 and tell me what you think.

Published 1868
Remember when I said you where stuck 500 years ago. Well this ancient book was out of date on its first print by about 300 years.

Yes, the book was written/printed before I was born, but I like it anyway. It explains why you cannot fly to planet Mars (topic), etc.

Yes, the book was written/printed before I was born, but I like it anyway. It explains why you cannot fly to planet Mars (topic), etc.

The guy thinks that the earth is flatter at the poles than the equator because the cold at the poles contracts the earth there. The book explains why the author is an idiot pretty early on.

I understand why you like it.

Quote from: Heiwa on July 31, 2022, 06:18:14 PM

Yes, the book was written/printed before I was born, but I like it anyway. It explains why you cannot fly to planet Mars (topic), etc.

The guy thinks that the earth is flatter at the poles than the equator because the cold at the poles contracts the earth there. The book explains why the author is an idiot pretty early on.

I understand why you like it.

The old  book suggests that the Sun orbits Earth, which I like. The book suggests that Earth doesn't rotate around its axis between the poles, which I consider wrong. Earth is a rotating, 360°/24 hrs globe, IMO, but rather immobile between the Sun and planet Mars. Electromagnetic forces keep Earth in place there. Swedish Nobel price winner Hannes Alfvén thinks so. Complicated stuff that is difficult to understand but easy to verify by looking out from any window on Earth watching the sky, the Sun and planet Mars. Nothing to get upset about, unless you are NASA or Musk trying to fly from Earth to Mars, which is not possible.

Swedish Nobel price winner Hannes Alvén thinks so.

I just read some of his writing, and no where am I seeing any indication that the thought the Earth or Sun where the centre of the universe. In fact, he writes about the solar system formation in a pretty ordinary fashion by todays standards
https://history.nasa.gov/SP-345/contents.htm

https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1984JApA....5...79A&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

You may have to give me a source, because I think this is a case of you not understanding his writings.

Yes, I list the sources of Hannes Alfvén at my website. Even if Alfvén was Swedish like me he wrote in English, like me.

Yes, I list the sources of Hannes Alvén at my website. Even if Alvén was Swedish like me he wrote in English, like me.

No one is going to your website. Sources or they dont exist. I suspect you have selected wildly out of contect text to make your theory work

Quote from: Heiwa on August 01, 2022, 01:43:13 AM

Yes, I list the sources of Hannes Alvén at my website. Even if Alvén was Swedish like me he wrote in English, like me.

No one is going to your website. Sources or they dont exist. I suspect you have selected wildly out of contect text to make your theory work

I have plenty visitors at my site. You are just jealous.
Anyway, what are you going to do during 200 days on a spacecraft going to Mars. Learning Marsian?

Anyway, what are you going to do during 200 days on a spacecraft going to Mars. Learning Marsian?

Transfer times can be dramatically reduced. Hohmann trasnsfers are not the only way to travel.
But for the first few decades, everyone going to Mars will be studying and exercising every day on the trip.
It will be a long time before its a recreational cruise.

Quote from: MaNaeSWolf on August 01, 2022, 01:45:17 AM

Quote from: Heiwa on August 01, 2022, 01:43:13 AM

Yes, I list the sources of Hannes Alvén at my website. Even if Alvén was Swedish like me he wrote in English, like me.

No one is going to your website. Sources or they dont exist. I suspect you have selected wildly out of contect text to make your theory work

I have plenty visitors at my site. You are just jealous.

Plenty of spiders and bots...No humans.

You don't even have enough visitors of the human kind to even register on traffic sites...



We'll have to wait till your site "matures" before we can recognize that a human actually visited it...How long has your site been around? 15+ years? It still hasn't matured enough to even register traffic. Hilarious.

I am quite happy with my web site. You are just jealous.

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Quote from: Heiwa on August 01, 2022, 11:01:34 AM

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Look at the counter bottom left  that I zero now and then. I have plenty visitors and good contact with my audience. I just do it for fun anyway with no ads. I make real money elsewhere. 

Quote from: Stash on August 01, 2022, 11:41:19 AM

Quote from: Heiwa on August 01, 2022, 11:01:34 AM

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Look at the counter bottom left  that I zero now and then. I have plenty visitors and good contact with my audience. I just do it for fun anyway with no ads. I make real money elsewhere.

A counter is like 1992 technology. Modern traffic measurements are infinitely more comprehensive and accurate.

Your traffic is all bots.

Use at a minimum Google Analytics - Look at your 'time on site' stats for your pages & drop-off rates. A "counter" is garbage. Literally no one uses that methodology anymore and haven't in almost decades.

Quote from: Heiwa on August 01, 2022, 12:33:09 PM

Quote from: Stash on August 01, 2022, 11:41:19 AM

Quote from: Heiwa on August 01, 2022, 11:01:34 AM

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Look at the counter bottom left  that I zero now and then. I have plenty visitors and good contact with my audience. I just do it for fun anyway with no ads. I make real money elsewhere.

A counter is like 1992 technology. Modern traffic measurements are infinitely more comprehensive and accurate.

Your traffic is all bots.

Use at a minimum Google Analytics - Look at your 'time on site' stats for your pages & drop-off rates. A "counter" is garbage. Literally no one uses that methodology anymore and haven't in almost decades.

Well, I use this free Statcounter software and it works for me. It tells me who visits my site. I do not use Google as it has never heard about me and my website and six web pages.

Quote from: Stash on August 01, 2022, 07:43:41 PM

Quote from: Heiwa on August 01, 2022, 12:33:09 PM

Quote from: Stash on August 01, 2022, 11:41:19 AM

Quote from: Heiwa on August 01, 2022, 11:01:34 AM

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Look at the counter bottom left  that I zero now and then. I have plenty visitors and good contact with my audience. I just do it for fun anyway with no ads. I make real money elsewhere.

A counter is like 1992 technology. Modern traffic measurements are infinitely more comprehensive and accurate.

Your traffic is all bots.

Use at a minimum Google Analytics - Look at your 'time on site' stats for your pages & drop-off rates. A "counter" is garbage. Literally no one uses that methodology anymore and haven't in almost decades.

Well, I use this free Statcounter software and it works for me. It tells me who visits my site.

Statcounter is like the lowest, least effective traffic analyzer there is.  A notch up from a 1993 counter.

I do not use Google as it has never heard about me and my website and six web pages.

Google's share of search is 91.86%. Thanks for proving my point.

Quote from: Heiwa on August 01, 2022, 10:48:07 PM

Quote from: Stash on August 01, 2022, 07:43:41 PM

Quote from: Heiwa on August 01, 2022, 12:33:09 PM

Quote from: Stash on August 01, 2022, 11:41:19 AM

Quote from: Heiwa on August 01, 2022, 11:01:34 AM

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Look at the counter bottom left  that I zero now and then. I have plenty visitors and good contact with my audience. I just do it for fun anyway with no ads. I make real money elsewhere.

A counter is like 1992 technology. Modern traffic measurements are infinitely more comprehensive and accurate.

Your traffic is all bots.

Use at a minimum Google Analytics - Look at your 'time on site' stats for your pages & drop-off rates. A "counter" is garbage. Literally no one uses that methodology anymore and haven't in almost decades.

Well, I use this free Statcounter software and it works for me. It tells me who visits my site.

Statcounter is like the lowest, least effective traffic analyzer there is.  A notch up from a 1993 counter.

Quote from: Heiwa on August 01, 2022, 10:48:07 PM

I do not use Google as it has never heard about me and my website and six web pages.

Google's share of search is 91.86%. Thanks for proving my point.

Google is shit in my view. Hasn't found my web pages, etc. In spite off this I have plenty visitors. But topic is what to do flying to Mars during 200 days. Any ideas?

Quote from: Stash on August 01, 2022, 11:27:14 PM

Quote from: Heiwa on August 01, 2022, 10:48:07 PM

Quote from: Stash on August 01, 2022, 07:43:41 PM

Quote from: Heiwa on August 01, 2022, 12:33:09 PM

Quote from: Stash on August 01, 2022, 11:41:19 AM

Quote from: Heiwa on August 01, 2022, 11:01:34 AM

I am quite happy with my web site. You are just jealous.

I'm not jealous of a website that has so little traffic that it doesn't even register.

Look at the counter bottom left  that I zero now and then. I have plenty visitors and good contact with my audience. I just do it for fun anyway with no ads. I make real money elsewhere.

A counter is like 1992 technology. Modern traffic measurements are infinitely more comprehensive and accurate.

Your traffic is all bots.

Use at a minimum Google Analytics - Look at your 'time on site' stats for your pages & drop-off rates. A "counter" is garbage. Literally no one uses that methodology anymore and haven't in almost decades.

Well, I use this free Statcounter software and it works for me. It tells me who visits my site.

Statcounter is like the lowest, least effective traffic analyzer there is.  A notch up from a 1993 counter.

Quote from: Heiwa on August 01, 2022, 10:48:07 PM

I do not use Google as it has never heard about me and my website and six web pages.

Google's share of search is 91.86%. Thanks for proving my point.

Google is shit in my view. Hasn't found my web pages,

Thanks again for proving my point.

In spite off this I have plenty visitors.

Yes, many bots visit. 15 years and Google doesn't even know your site exists. If Google doesn't acknowledge your site, no one does. No "webmaster" in their right mind would let that happen, especially after a decade and a half. Thanks again for proving my point.

But topic is what to do flying to Mars during 200 days. Any ideas?

Drinking champagne and looking out a window.

I asked Elon about the champagne on his space flights and he didn't reply. But the view is free if you have a window seat.

I thought this would be interesting to drop here.


This is  DeltaV map.



This is how much Delta V (dV) , or change in velocity is needed to go from earth to other places in the solar system. Its overly simplified, as orbits are not perfectly circular and will change depending on the year, time you launch. These numbers are km/s of change in velocity. Meaning, to get to 1km/s, is measured from your current position at that point.

A typical rocket needs a dV of about 9.4km/s to go from earth to LEO. Then an additional 3.91km/s (2.44 + 1.47) to get to Geo orbit.
This gives you an idea of how much energy a rocket needs to expend to get to various places in the solar system. You can obviously expend more energy to get to the destination faster, but it wont be the most efficient route.

Starship and its booster with about 100t of payload has about 9.6km/s of dV from earth surface. Which means it has just enough energy to put 100t in LEO, but not much else.
It can however refill a starship by leaving a depot in orbit and refilling it with 100tons at a time. Each refill will give it an additional energy up to a maximum of 8.6km/s starting from LEO.
This allows nearly any destination available for it in the Solar system. A return trip is a different story.

That is super cool. I've been meaning to mess around with KSP forever.

Here's another interesting calculator, so to speak:

NASA Ames Research Center Trajectory Browser

Keeps crashing for me, but I familiar with it.

This is also very nice that it shows how the dV changes over time. Fortunately Mars is not particularly difficult to get to, its just very far.
If you consider that a craft can use its atmosphere to slow down at Mars, its actually possible to land on the surface of Mars with less energy than the surface of the Moon

So interesting ESA news.

https://esamultimedia.esa.int/docs/technology/The_Case_for_an_ESA_preparatory_programme_for_Space-Based_Solar_Power_for_terrestrial_energy_needs.pdf

They have just released a study considering space based solar.
This will launch up to 52 2km wide, 2000 ton solar collectors in GEO.
Will need about 500 rocket launches a year for about 20 years of the Starship scale to get it done by 2050.

So Europe could be getting a real rocket program one day