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Thread: Spacecraft propulsion article updates
Post: RE: Spacecraft propulsion article updates
| IIIRC somewhere here earlier someone wrote fusion NSWRs are "unrealistic" and cut them off the setting. Seems like that may not be the case http://www.projectrho.com/public_html/rocket/enginelist2.php... |
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MichaelPoole |
General Setting Discussion
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43 |
525 |
02-20-2023, 08:13 PM |
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Thread: Minimum usable acceleration for a spacecraft
Post: RE: Minimum usable acceleration for a spacecraft
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Drashner1 Wrote: (02-01-2023, 11:19 PM)
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I'm not saying that it would, I'm saying that even if it did, it wouldn't matter. Most solar sail missions that I've ever read about involve moving cargo ar... |
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MichaelPoole |
General Off-topic Discussion
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10 |
1,609 |
02-02-2023, 03:33 AM |
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Thread: Minimum usable acceleration for a spacecraft
Post: RE: Minimum usable acceleration for a spacecraft
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Drashner1 Wrote: (01-31-2023, 04:17 AM)
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e) Using one of the many available acceleration calculators online, it comes up that a constant acceleration 3 milligee boost gets you across an AU of dista... |
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MichaelPoole |
General Off-topic Discussion
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10 |
1,609 |
02-01-2023, 09:58 PM |
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Thread: Minimum usable acceleration for a spacecraft
Post: Minimum usable acceleration for a spacecraft
| Hello, apologies if this is in the wrong section, it's hard SF related but it didn't seem to fit any other part of the forum for me.
So, when reading up on rocketry on Projectrho, I came upon this ... |
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MichaelPoole |
General Off-topic Discussion
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10 |
1,609 |
01-30-2023, 11:06 PM |
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Thread: Argus Array capabilities near its limit
Post: RE: Argus Array capabilities near its limit
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stevebowers Wrote: (08-12-2022, 10:12 PM)
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Actually, even at z-60 the wavelength of sunlight from a sun-like star would still be in the infrared spectrum. Infrared radiation wavelength extends all ... |
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MichaelPoole |
General Setting Discussion
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10 |
123 |
08-13-2022, 07:54 PM |
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Thread: Argus Array capabilities near its limit
Post: RE: Argus Array capabilities near its limit
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stevebowers Wrote: (08-12-2022, 02:25 AM)
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Angular diameter distance is the most important factor for the apparent size of a distant galaxy or other object more than about seven billion light years... |
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MichaelPoole |
General Setting Discussion
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10 |
123 |
08-12-2022, 06:37 AM |
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Thread: Argus Array capabilities near its limit
Post: RE: Argus Array capabilities near its limit
| https://www.orionsarm.com/forum/showthread.php?tid=4070&pid=48143#pid48143
Is this for comoving or light travel distance? |
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MichaelPoole |
General Setting Discussion
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10 |
123 |
08-12-2022, 01:58 AM |
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Thread: Argus Array capabilities near its limit
Post: Argus Array capabilities near its limit
| So, I've just read the Argus Array article and it is way cooler than I expected. The notion of being able to see 10 km objects in the Andromeda Galaxy after just 10 seconds and objects smaller than a ... |
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MichaelPoole |
General Setting Discussion
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10 |
123 |
08-11-2022, 03:00 PM |
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Thread: The Garden Worlds article
Post: RE: The Garden Worlds article
| The real challenge is not the pressure. The critical point of water is far less than say, the pressure in the Mariana Trench where macroscopic organisms live. No, the real challenge is temperature. |
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MichaelPoole |
Encyclopaedia Galactica Articles
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13 |
216 |
06-14-2022, 06:59 PM |
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Thread: The Garden Worlds article
Post: RE: The Garden Worlds article
| What I find most challenging - and interesting! - about envisioning life based in supercritical water is the chemistry tbh. Supercritical water is a great solvent and in deep ocean worlds may even be ... |
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MichaelPoole |
Encyclopaedia Galactica Articles
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13 |
216 |
06-14-2022, 09:49 AM |
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Thread: The Garden Worlds article
Post: RE: The Garden Worlds article
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The Astronomer Wrote: (06-10-2022, 10:06 AM)
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MichaelPoole Wrote: (06-10-2022, 10:02 AM)
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The Garden World article has many potentially very interesting and cool planets, including biospheres us... |
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MichaelPoole |
Encyclopaedia Galactica Articles
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13 |
216 |
06-10-2022, 10:15 AM |
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Thread: The Garden Worlds article
Post: The Garden Worlds article
| The Garden World article has many potentially very interesting and cool planets, including biospheres using supercritical water, CO2 or a carbon monoxide-hydrocarbon mix as a liquid medium. The only p... |
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MichaelPoole |
Encyclopaedia Galactica Articles
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13 |
216 |
06-10-2022, 10:02 AM |
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Thread: ArcBuilders universe
Post: ArcBuilders universe
| Hello, anyone remembers the universe and perhaps has some archive links about it please? It seemed to have disappeared from the Internet, which is really sad. I loved the setting, and I preferred the ... |
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MichaelPoole |
Books, Games, Movies, and TV
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2 |
2,370 |
12-30-2021, 12:31 PM |
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Thread: Mnemosyne - a picture of Solar System in the 27th century
Post: RE: Mnemosyne - a picture of Solar System in the 2...
| Drashner1Hm. Ok. Based on the above, my sense is that any feedback anyone provides will simply be dismissed or after-the-fact rationalized away (using information you failed to provide in the first pl... |
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MichaelPoole |
General Off-topic Discussion
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21 |
25,567 |
06-18-2020, 11:57 AM |
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Thread: Naphthalean worlds
Post: RE: Naphthalean worlds
| What would be the atmosphere of such worlds? Plenty of CO, hydrogen (on higher mass worlds) I assume? |
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MichaelPoole |
General Setting Discussion
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15 |
255 |
05-28-2020, 01:46 AM |
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Thread: Mnemosyne - a picture of Solar System in the 27th century
Post: RE: Mnemosyne - a picture of Solar System in the 2...
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Drashner1 Wrote: (05-19-2020, 02:04 AM)
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Starting from that number and ignoring emigration from Earth we are looking at 498 years for population to grow.
At a growth rate of 1.2% we end up with 38... |
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MichaelPoole |
General Off-topic Discussion
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21 |
25,567 |
05-25-2020, 08:44 AM |
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Thread: AreanXeric planet subtype
Post: RE: AreanXeric planet subtype
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stevebowers Wrote: (05-24-2020, 03:20 AM)
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these worlds could come in many types, from nearly Gaian to nearly LithicGelidian.
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That's very interesting, are there any examples of these 2 extreme... |
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MichaelPoole |
Encyclopaedia Galactica Articles
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23 |
317 |
05-24-2020, 04:03 AM |
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Thread: AreanXeric planet subtype
Post: RE: AreanXeric planet subtype
| Back on topic, just how varied are Arean worlds? How different from Mars can they get? |
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MichaelPoole |
Encyclopaedia Galactica Articles
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23 |
317 |
05-24-2020, 02:21 AM |
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Thread: The World Garden
Post: RE: The World Garden
| Both a question and a suggestion kinda - can some concievable form of exotic life exist in flowing "dirty" ice? That is, solid water or other substance with something dissolved in it? |
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MichaelPoole |
Encyclopaedia Galactica Articles
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182 |
3,287 |
05-21-2020, 05:14 AM |
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Thread: The World Garden
Post: RE: The World Garden
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dangerous_safety Wrote: (05-17-2020, 08:48 AM)
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MichaelPoole Wrote: (05-17-2020, 07:30 AM)
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Hmm, how about straight up silicon biochemistry for the NaCl solvent life? Isaac Arthur said in his v... |
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MichaelPoole |
Encyclopaedia Galactica Articles
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182 |
3,287 |
05-17-2020, 08:53 AM |
