Free planetarium

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by Watsisname
20 Jul 2017 14:12
Forum: Space Journeys
Topic: Planets with potentially breathable atmospheres
Replies: 195
Views: 8506

Planets with potentially breathable atmospheres

10254 Fahrtsmaug A+ name. :P elemental , the trick is to be able to search a lot of planets quickly and with the highest probability of success.  For that I'll choose: System's main star = 'main sequence', 'any', 'any'  Sun count = 1  (I find it takes longer if you need to swap between multiple sta...
by Watsisname
20 Jul 2017 00:06
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Videos
Replies: 184
Views: 8420

Science and Astronomy Videos

I was just watching that.  His last comment about "precision astrophysics" is so true.  
by Watsisname
19 Jul 2017 21:15
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 116
Views: 4908

Astrophotography

Spacer , yes, a NELM of 6.9-7.1 is an excellent sky. :)  That's between Bortle 2 and 3, so it'll be like where I took the aurora photos from.  In addition to the Milky Way, which will look very bright and detailed, you may also see the Zodiacal Light  and perhaps even  Airglow . Zodiacal light look...
by Watsisname
19 Jul 2017 02:10
Forum: Science and Astronomy Discussions
Topic: Something must be wrong with this exoplanet...
Replies: 3
Views: 71

Something must be wrong with this exoplanet...

It's not a typo.  T he reported mass of 0.7 Jupiter masses is the upper limit   based on constraints from radial velocity data.  (This is why exoplanet.eu says 0.7M J  with errors of +0.0 and -nan).   A more probable mass would be found by the mass-radius relation for planets , but it depends on the...
by Watsisname
19 Jul 2017 01:38
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 116
Views: 4908

Astrophotography

I decided to make a comparison to show just how dramatic the difference in brightness of the sky is from different locations.  Same part of the sky, same equipment, and same exposure settings, all straight from the camera with no editing besides resizing.  (30s exposure, f/2.0, ISO3200, 4000K white ...
by Watsisname
18 Jul 2017 23:13
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 116
Views: 4908

Astrophotography

The sky at class 4 is still much, much better than 7, and you'll be able to see the Milky Way. :)  But if you're able to then sure, go for the darkest sky you can get!   I grew up just outside of Washington DC, which is Bortle class 8.  The first time I went out in the country and saw it as class 4,...
by Watsisname
18 Jul 2017 18:47
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 116
Views: 4908

Astrophotography

10116 Did you take those pictures in Washington state, or you traveled somewhere? Can you tell me the location? Not too far -- about a 90 minute drive from where I live.  Location is the end of the Mt. Baker Highway , which gets away from the city lights and up in the mountains.  Marvelous place. 1...
by Watsisname
18 Jul 2017 18:28
Forum: Off-topic Discussions
Topic: Theology and Spirituality
Replies: 37
Views: 493

Theology and Spirituality

midtskogen , thanks, I just wanted to be sure to understood your meaning correctly.  Yeah, absolutely, much of consciousness is illusory, and thinking you made a choice after the choice was already made is a good example.  I once heard an apt description of conscious will as "your brain's way ...
by Watsisname
18 Jul 2017 18:06
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 198
Views: 9043

Science and Astronomy News

10140 New breakthrough discovery—every quantum particle travels backwards Ah, this is bad/sensationalist science reporting. 1)  Every quantum particle is not travelling backwards.   What they are showing is that the probability current can be opposite the direction of the particle's momentum.  Howe...
by Watsisname
18 Jul 2017 00:43
Forum: Space Journeys
Topic: Planets with potentially breathable atmospheres
Replies: 195
Views: 8506

Planets with potentially breathable atmospheres

*watsisname perches on the side of a mountain on Starlight's planet, breathes in the crisp blue air, and marvels at the night sky above the clouds*   Hopefully without freezing his lungs. http://i.imgur.com/ZBLItY0.jpg http://i.imgur.com/IbJiUG8.jpg http://i.imgur.com/ZvZzaqd.jpg
by Watsisname
18 Jul 2017 00:10
Forum: Space Journeys
Topic: Planets with potentially breathable atmospheres
Replies: 195
Views: 8506

Planets with potentially breathable atmospheres

I'm going to say here "congratulations!" , cause you found one!    :D The oxygen pressure of 0.483atm is in the breathable range (0.1 to 0.6).  And at first glance, one might think the CO2 is too high at 0.0876atm.  But the trick is to use altitude.  For example, if you move up in altitude...
by Watsisname
17 Jul 2017 23:44
Forum: Off-topic Discussions
Topic: Theology and Spirituality
Replies: 37
Views: 493

Theology and Spirituality

10106 Dualism can be deductively proven false I don't think dualism in its general sense can be proved false.  Rather, it cannot be falsified , which is why it isn't science or a defensible model of reality. We can quite likely show that consciousness is entirely physical, and thus dualism yields t...
by Watsisname
17 Jul 2017 20:01
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 116
Views: 4908

Astrophotography

Yeah, and I was very nearly clouded out.  Overcast at dusk, and then it suddenly cleared just in time before twilight rose in the north. Darkness lasts such a short time here in summer.

Have you seen them before?  Maybe near next solar max you'll get some good opportunities your way.
by Watsisname
17 Jul 2017 19:47
Forum: Off-topic Discussions
Topic: Theology and Spirituality
Replies: 37
Views: 493

Theology and Spirituality

10062 But, what about teleportation? There has been some talk here about would we be alive if we teleported and be ourselves. Let's say that we teleported. So all of our atoms had to be reasambled in one piece. But as we are ripped apart, that would mean we died. And let's say there is soul and we ...
by Watsisname
17 Jul 2017 18:58
Forum: Space Journeys
Topic: Planets with potentially breathable atmospheres
Replies: 195
Views: 8506

Planets with potentially breathable atmospheres

Wow, you keep hitting these really close cases!  This one is pretty interesting.  Lots of hydrocarbons (C2H2 is acetylene, C2H4 is ethylene, and CH4 is methane), all fairly nontoxic but flammabe/explosive in certain mixtures with oxygen.  I'm pretty sure that is not an issue at these concentrations ...
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