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The Life and Death of Stars - Educational Activity is ready

Posted: 13.11.2003, 05:20
by fsgregs
Hi folks:

If you've been following the separate thread regarding an Activity I'm developing which takes you through the Life cycle of Stars (and the Destruction of Earth), I'm pleased to advise that the Activity is now complete and hopefully, debugged. Thanks to Don Goyette's great editing, and the stupendous add-ons made available by other forum folk, I think you will love this effort. The Activity will take you on a rich journey through the complete life and death cycle of stars. Over 20 stops are made to such places as stellar nebula nurseries, rotating protostars, main sequence, white, yellow and blue supergiants, Red Giant stars, exploding nova and supernova, glaring white dwarfs, hot neutron stars, spinning pulsars, enormous black holes and dying black dwarfs (theoretical). You will see the death of Earth as it is consumed by a swelling Red Giant, and discover what Mars, Jupiter and even Pluto may look like billions of years in the future, as our Sun nears the end of its life.

The Activity is written in MS Word and is 20 pages long. It assumes no prior knowledge of Celestia and is a step by step journey that takes about 1 -2 hours to complete in real time. Most of the travel is by imbedded cel:url links within the document, but some travel is done with the spaceship or with the goto objects features of Celestia.

I've tried to make this a scientifically accurate portrayal of how both regular and large stars live and die. It is designed for anyone who has an interest in the topic

The Activity is version 6.2 and requires (gasp) 57 MB of add-on files. I have packaged and zipped them all together in five (5) separate zip files on my website. You can find them at:

http://www.fsgregs.org/celestia/

That is a lot of files to download but the Activity really requires them. These add-ons are in part existing add-ons from the forum and in part, custom designed add-ons that many of you folks did for me to support my work on the NASA project. I want to particularly thank Rassilon, Don Edwards, Dave Nessler and Jack Higgins for their great design efforts in some of the add-ons.

The add-ons on my website are in fact, being hosted by a friend on his server. If you have a dial-up modem, please don't try to download 57 MB all at once. Perhaps you can do it late at night so as not to tie up his server.

Part A of the zip files contains the Activity and a read-me file. Read that file first. In it, you will discover that in order to do the Activity, you will have to do some minor editing of your solarsys.ssc file. I tell you what to do in the Read-me file.http://www.fsgregs.org/celestia/

Let me know what you think of the Activity. If you encounter any problems with the add-ons (they were quite complicated to coordinate), send me a private message.

This is a true labor of love, done over 40 man-hours on a voluntary basis. Celestia inspired me to do it. I hope you all enjoy the journey.

:D

Regards,

Frank

Posted: 13.11.2003, 12:32
by Commander David
Hi fsgregs,

i`ve loaded our AddOn and it looks fantastic to me. I`m happy to see my Protodisc AddOn in there (the 3d). The journey from the beginning to the end of a star are verry good.
I got little fear as I saw our earth in the distant future and then our (somewhat larger) sun to the left. Also the textures are very good, thanks to all helped. The tour is a must see. Very good work, indeed.

thanks for this great AddOn.

cannot download first part

Posted: 13.11.2003, 13:48
by Tom
Hi i have just found this place and dowloaded parts B, C, D and E. When i come to get part A this comes up.

--------------------------------------------------------------------------------
You are not authorized to view this page

You might not have permission to view this directory or page using the credentials you supplied.

If you believe you should be able to view this directory or page, please try to contact the Web site by using any e-mail address or phone number that may be listed on the http://www.fsgregs.org home page.

You can click Search to look for information on the Internet.

HTTP Error 403 - Forbidden
Internet Explorer
--------------------------------------------------------------------------------

Any ideas what this means.

Thanks
Tom

Problems with part A of Activity 6

Posted: 13.11.2003, 18:11
by Ramón
Hi everyone.
My name is Ram?n Vargas and I manage a planetarium in the city of Xalapa, Veracruz in Mexico.
I've been making use of Celestia as a mayor support for our star proyector and let me tell you that is a great success.
Congratulations to all you people who make this beautiful program possible.
I just download the actvity 6 from mr. Gregorio (I've been waiting for it a long time) but at the moment when I unzip the part A of the activity I got an error message: bad zip file or part of a spanned file.
I got no problems at the time of unzip the others parts of the activity.
Any help?
Thanks for the good work.

Posted: 13.11.2003, 19:29
by selden
I had no problems downloading and extracting part A early this morning.

Unless Frank's server is having disk errors, I suspect that the zip file is getting damaged in transit.

At the moment, the only thing to do is to try to download it again.

Posted: 13.11.2003, 22:26
by maxim
Hi Frank,

thank you for the great work. :D

maxim.

Posted: 13.11.2003, 23:50
by fsgregs
Sorry folks. I too got an error message. I've deleted and reinstalled Part A on my website. Look for it as Celestia Activity 6.2, Part A zip. It worked when I tried downloading it again.

:?

Thanks for the kind words, everybody. I hope you all get a chance to take the journey and enjoy it.

Regards,

Frank

Posted: 14.11.2003, 12:26
by Guest
Frank,

From the screen shot posted before I can't wait to dive into this one!

Nice work, I can't wait to see this.

Mike

Request info

Posted: 14.11.2003, 17:04
by Ramón
Hi Frank, this is Ram?n Vargas from Xalapa, Veracruz.
I download the part A of your activity and try it out already.
It's excellent, what a great job!
Thanks to you and to al the celestia comunity involved in the proyect.
I'm going to adapt your activity into a cel script (if there is no objection) so I could presented as a planetarium show.
But I have a technical question: the coordinates x, y z of the camara in Cel://URLs are encoded in Base64.
What is that?
How can I translate these encoded coordinates into coordinates for the gotoloc cel comand?
I have no problem with the other parameters in the Cel://URLs.
Thanks again for a nice job.
Greetings from M?xico.

Posted: 14.11.2003, 22:09
by fsgregs
Ramon:

I'm delighted the Activity has given you pleasure. You may convert it to a script and run it in your planetarium. I would be honored to contribute it to your work.

Sadly, I have no knowledge of how the coordinates are created or saved in cel:url's. Perhaps Chris or someone else familiar with the program can answer that question for you. Help ... anyone???

:)

Frank

Posted: 14.11.2003, 23:09
by Rassilon

Posted: 16.11.2003, 12:43
by TERRIER
Frank

I don't know whether this is just happening to me, but I'm still having problems downloading part 6.2A of your activity. It starts downloading fine, but always seems to quit at around 3.5MB out of the 7.03MB in total.

All the other parts I've managed to download OK.

Plaease can you help!? :(

regards
TERRIER

Posted: 16.11.2003, 12:58
by TERRIER
I've just tried downloading it again for the ump-teenth time as I was writing the post above, and it has worked :D .

It seems to be a case of 'If at first you don't succeed.....' !!

TERRIER

Posted: 16.11.2003, 13:50
by marc
Same goes here I've tried part A twice with no luck, it stops at about 4.5M
All the other parts worked first time.
I'm keen to see it, will try again later. :)

Posted: 17.11.2003, 15:05
by adamnieman
Frank,

I've just been through the whole tour - though I got diverted for a long time flying around beautiful nebulae and protoplanetary disks at hyper light speed :wink: .

Fantastic work :D. Well done. I've seen a side of Celestia that I didn't realise was there.

Best wishes,

Adam

Re: Request info

Posted: 17.11.2003, 20:28
by don
Hello Ramon,

Ram?n wrote:But I have a technical question: the coordinates x, y z of the camara in Cel://URLs are encoded in Base64.
What is that?
How can I translate these encoded coordinates into coordinates for the gotoloc cel comand?

I have tried a couple different BASE64 converter programs and they do not recognize the format generated by a Cel://URL <frown>.

Does anyone know of a converter that will work with these values?

Thank you,

-Don G.

Posted: 17.11.2003, 21:11
by selden
The hex values in Cel://URLs are dumps of Celestia's internal rendering flags. You probably shouldn't depend on any particular value in the URL representing any particular flag. They will change as new render flags get added and obsolete ones get deleted in future versions of Celestia.

Posted: 17.11.2003, 21:52
by don
We're talking about the X, Y and Z coordinates that are Base64 encoded, as Christophe wrote in another thread: (x, y, and z: 64 bits coordinates encoded in Base64).

Here is an example Cell://URL, where the variables ?x, &y and &z are the Base64 values.:

?x=AJT7sSrOEN69DA
&y=CnAYmsrf+aT//////////w
&z=VZI/cjHZDp4

Code: Select all

cel://Freeflight/2003-11-06T23:37:09.45064?x=AJT7sSrOEN69DA&y=CnAYmsrf+aT//////////w&z=VZI/cjHZDp4&ow=0.503489&ox=-0.013363&oy=-0.286829&oz=0.814892&select=Sol&fov=27.499998&ts=15000.000000<d=0&rf=6419&lm=128

-Don G.

Posted: 17.11.2003, 22:33
by Guest
Thanks everyone. I'm so glad that I've been able to help folks appreciate Celestia and its magnificent universe better.

:D :D :wink:

I don't know why it takes multiple tries to get Part A to download. It must have something to do with my host's server traffic. Anyway, I urge everyone to take this journey. Keep trying on the downloads.

Frank

Posted: 04.01.2004, 12:11
by Techno
I see the maker doesn't have the website up anymore :(