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by midtskogen
23 Jan 2017 00:53
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Videos
Replies: 476
Views: 129704

Science and Astronomy Videos

We invent the logic, and discover the consequences of that logic. True, but not necessarily in that order, which leads to the philosophical questions.  We knew how to add natural numbers before we invented the logic behind it (like the Peano axioms).  In many cases I would say that it's the discove...
by midtskogen
15 Jan 2017 21:30
Forum: Space Journeys
Topic: Planets with potentially breathable atmospheres
Replies: 370
Views: 120423

Planets with potentially breathable atmospheres

If you have more than about 500ppm of C02, the atmosphere will be disorienting to breathe even if you have enough oxygen. Any more than 1000ppm, and you're dead within a few hours. I've measured CO2 in my house for a decade, and over the past month it looks like this: x.png The diurnal cycle mostly...
by midtskogen
12 Jan 2017 00:12
Forum: Off-topic Discussions
Topic: Totally off-topic thread
Replies: 1053
Views: 305462

Totally off-topic thread

Remember way back when I said that forecast skill will improve not so much by improving our knowledge of the physics but by raising the computer power and grid resolution? Yes, but just throwing more computer power at the problem will never take you as far as you can go.  You also need to be clever...
by midtskogen
11 Jan 2017 13:16
Forum: Off-topic Discussions
Topic: Totally off-topic thread
Replies: 1053
Views: 305462

Totally off-topic thread

I'm getting more and more impressed with the short term forecasts by the Norwegian met office considering Norway's difficult terrain.  The forecasts have improved significantly over the past few years.  I occasionally check the quality for my location.  The grid size for short term forecasts have be...
by midtskogen
10 Jan 2017 12:42
Forum: Development
Topic: Quotes about Universe for loading window
Replies: 102
Views: 52021

Quotes about Universe for loading window

I like insights dating from the antiquity, though not always derived correctly.  For instance, Lucretius (1st century BC, paraphrasing 4th century BC Epicurus who believed in an infinite universe and many earths):"It cannot by any means be thought likely that this is the only round earth and sk...
by midtskogen
10 Jan 2017 04:34
Forum: Off-topic Discussions
Topic: Totally off-topic thread
Replies: 1053
Views: 305462

Totally off-topic thread

I think the video was intended to be funny more than to be accurate. :) I was invited to follow the Philae landing from the office of the Norwegian Space Centre and took an early day off for this event.  The "touchdown" moment was a bit unclear.  As I recall it, there was a confirmation th...
by midtskogen
09 Jan 2017 22:52
Forum: Off-topic Discussions
Topic: Totally off-topic thread
Replies: 1053
Views: 305462

Totally off-topic thread

by midtskogen
09 Jan 2017 10:27
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 908
Views: 238088

Science and Astronomy News

It's a bold prediction, which is fine as long as they are prepared to be proven wrong.  The cool thing is that this is something that amateur astronomers can keep an eye on over the next year and possibly collect a lot of useful data.
by midtskogen
09 Jan 2017 10:12
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 503
Views: 166017

Show off your work

Speaking of prolonged darkness, I'm more and more interested in antarctic programs, and people passing months in isolation in places like Concordia or McMurdo bases. I always think of a tweet a couple years ago, showing a -68°C on a screen, when someone around me is making noises for a "cozy -...
by midtskogen
09 Jan 2017 04:25
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 503
Views: 166017

Show off your work

My northermost is 79[color=#ffffff]°12'N (11°57'E).  We had planned to pass[color=#ffffff] 80° north of Spitsbergen, but ice blocked the north coast that summer.  This was in the 90's when the ice conditions were worse than today (even today in January there's open water to [color=#ffffff]82°) . Pe...
by midtskogen
09 Jan 2017 01:30
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 503
Views: 166017

Show off your work

The sun is 6 degrees above the horizon at noon in mid-winter here, and I don't really perceive the light as yellow, but a digital camera will disagree objectively.  The only thing special about mid-winter noon is that if there's a thick cloud cover, then the day never feels fully bright.  This is pa...
by midtskogen
08 Jan 2017 11:45
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 503
Views: 166017

Show off your work

Winter sunsets last a long time at high latitudes.  I think this red sunset might have been caused by temperature inversion, trapping cold, misty air near the ground, and at high altitudes the sun passes through that layer just before it sets.
by midtskogen
08 Jan 2017 10:18
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 503
Views: 166017

Show off your work

Inversion and another sunset.


solnedgang-20170108.jpg
by midtskogen
08 Jan 2017 08:03
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Videos
Replies: 476
Views: 129704

Science and Astronomy Videos

Speech recognition is also fascinating, but proof reading is advisable before publishing.
► Show Spoiler