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    Thread: Planetary classification
Post: RE: Planetary classification

How much can Neptunian conditions vary? I was thinking such worlds could be more varied than what one would expect, from basically Cytherean worlds with H/He dominated atmospheres to having a sea of m...
MichaelPoole General Setting Discussion 365 7,348 10-12-2023, 06:31 AM
    Thread: Pen-y-ghent system in Universe Sandbox 2
Post: RE: Pen-y-ghent system in Universe Sandbox 2

stevebowers Wrote: (07-21-2023, 09:50 PM) -- I don't know if you can use them, but here are some Io-like textures I have found in my files. Free for anyone to use. -- Thank you! Will def finish t...
MichaelPoole Art and Visual Media 6 100 08-01-2023, 10:22 AM
    Thread: Pen-y-ghent system in Universe Sandbox 2
Post: RE: Pen-y-ghent system in Universe Sandbox 2

stevebowers Wrote: (07-20-2023, 06:02 PM) -- Fantastic! We can replace the images in the article with yours if you like. I admit I sometimes confused radius with diameter in my early articles; w...
MichaelPoole Art and Visual Media 6 100 07-20-2023, 11:58 PM
    Thread: Pen-y-ghent system in Universe Sandbox 2
Post: Pen-y-ghent system in Universe Sandbox 2

Pent-y-ghent system doesn't really have a lenghty description apart from Ribblehead but it has a nostalgic value for me (one of the first Orion's Arm articles I've read) so here's my take on it in Uni...
MichaelPoole Art and Visual Media 6 100 07-20-2023, 11:59 AM
    Thread: Is GJ 1214 in Orion's Arm?
Post: Is GJ 1214 in Orion's Arm?

Given the recent discoveries of a steam rich atmosphere and measurement of (presumably cloudtop) temperatures of GJ 1214b by JWST (more here A reluctant exoplanet lifts its veil – a bit | Max Planck I...
MichaelPoole Encyclopaedia Galactica Articles 1 40 06-23-2023, 04:09 AM
    Thread: Seven Marbles (TRAPPIST-1) - Pre-Terragen
Post: RE: Seven Marbles (TRAPPIST-1) - Pre-Terragen

dangerous_safety Wrote: (10-08-2020, 09:36 AM) -- considering this is a nearby system if scientific interest, and a future JWST target, I wouldn't say its done even after this iteration is finished. ...
MichaelPoole Encyclopaedia Galactica Articles 30 556 06-22-2023, 05:12 AM
    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...
MichaelPoole General Setting Discussion 43 546 02-20-2023, 08:13 PM
    Thread: Minimum usable acceleration for a spacecraft
Post: RE: Minimum usable acceleration for a spacecraft

Drashner1 Wrote: (02-01-2023, 11:19 PM) -- 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...
MichaelPoole General Off-topic Discussion 10 5,688 02-02-2023, 03:33 AM
    Thread: Minimum usable acceleration for a spacecraft
Post: RE: Minimum usable acceleration for a spacecraft

Drashner1 Wrote: (01-31-2023, 04:17 AM) -- 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...
MichaelPoole General Off-topic Discussion 10 5,688 02-01-2023, 09:58 PM
    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 ...
MichaelPoole General Off-topic Discussion 10 5,688 01-30-2023, 11:06 PM
    Thread: Argus Array capabilities near its limit
Post: RE: Argus Array capabilities near its limit

stevebowers Wrote: (08-12-2022, 10:12 PM) -- 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 ...
MichaelPoole General Setting Discussion 10 131 08-13-2022, 07:54 PM
    Thread: Argus Array capabilities near its limit
Post: RE: Argus Array capabilities near its limit

stevebowers Wrote: (08-12-2022, 02:25 AM) -- 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...
MichaelPoole General Setting Discussion 10 131 08-12-2022, 06:37 AM
    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?
MichaelPoole General Setting Discussion 10 131 08-12-2022, 01:58 AM
    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 ...
MichaelPoole General Setting Discussion 10 131 08-11-2022, 03:00 PM
    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.
MichaelPoole Encyclopaedia Galactica Articles 13 229 06-14-2022, 06:59 PM
    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 ...
MichaelPoole Encyclopaedia Galactica Articles 13 229 06-14-2022, 09:49 AM
    Thread: The Garden Worlds article
Post: RE: The Garden Worlds article

The Astronomer Wrote: (06-10-2022, 10:06 AM) -- MichaelPoole Wrote: (06-10-2022, 10:02 AM) -- The Garden World article has many potentially very interesting and cool planets, including biospheres us...
MichaelPoole Encyclopaedia Galactica Articles 13 229 06-10-2022, 10:15 AM
    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...
MichaelPoole Encyclopaedia Galactica Articles 13 229 06-10-2022, 10:02 AM
    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 ...
MichaelPoole Books, Games, Movies, and TV 2 3,683 12-30-2021, 12:31 PM
    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...
MichaelPoole General Off-topic Discussion 21 32,816 06-18-2020, 11:57 AM