Ultimate space simulation software

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by Watsisname
17 Dec 2018 04:01
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 514
Views: 57156

Science and Astronomy News

25545 Wat perhaps this belongs in the cosmology thread, but what do you think of the recent paper published about dark fluid as a way to unify dark matter and dark energy? I wrote a review/critique of it here if you'd like to see that.  Otherwise the short version is that it makes several incorrect...
by Watsisname
16 Dec 2018 12:16
Forum: Off-topic Discussions
Topic: UFO Sightings and Possible Explanations
Replies: 61
Views: 5028

UFO Sightings and Possible Explanations

25520 What we see is not really the object itself glowing, but the air surrounding it glowing.  So altitude, atmospheric composition, speed conditions should also matter. Absolutely.  The glowing part of a meteor is a mixture of atoms from the object that have been vaporized, ionized, and mixed wit...
by Watsisname
16 Dec 2018 06:46
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 514
Views: 57156

Science and Astronomy News

Oh, I forgot to post to say the discussion following from that was moved to the UFO sightings and possible explanations thread.  Most likely it was just an airplane, but it also led to a lot of interesting talk about different meteor effects.
by Watsisname
16 Dec 2018 05:51
Forum: Off-topic Discussions
Topic: UFO Sightings and Possible Explanations
Replies: 61
Views: 5028

UFO Sightings and Possible Explanations

25490 I have seen a number of green ones. I believe they are bits of space junk. ie the metals producing the colours in satellite parts or similar as they turn into plasma. Natural meteors contain a variety of metals and other elements, and can glow in all sorts of colors including green.   When I ...
by Watsisname
14 Dec 2018 03:14
Forum: Off-topic Discussions
Topic: UFO Sightings and Possible Explanations
Replies: 61
Views: 5028

UFO Sightings and Possible Explanations

The definition goes by brightness rather than sound: meteors that get brighter than Venus are called fireballs, and bolides are brighter than the full Moon.  Meteors big enough to reach bolide brightness do tend to produce an audible boom from passing through the atmosphere, and may also airburst.  ...
by Watsisname
14 Dec 2018 01:45
Forum: Off-topic Discussions
Topic: UFO Sightings and Possible Explanations
Replies: 61
Views: 5028

UFO Sightings and Possible Explanations

25423 I could even hear a hissing sound as it passed over. This is something I find very interesting that is sometimes reported with very bright meteors.   At first glance it seems impossible, because the meteor is very far away and it takes time for the sound of its passage to reach you (and if/wh...
by Watsisname
13 Dec 2018 03:03
Forum: Off-topic Discussions
Topic: UFO Sightings and Possible Explanations
Replies: 61
Views: 5028

UFO Sightings and Possible Explanations

25394 So it could be that I saw a piece of space junk falling or something? I don't think so.  Re-entering space junk doesn't change directions.   I won't tell you that you just imagined it (I've seen weird stuff I can't explain, too), but nothing entering the atmosphere at such speeds can change d...
by Watsisname
13 Dec 2018 01:18
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 514
Views: 57156

Science and Astronomy News

25390  I have rarely seen slow bright meteors with Perseids too but it required observation over three consecutive nights to see just one- that one actually had a tail and dropped somewhere over the Ocean to our south I think. Meteor showers have particles with a distribution of sizes, and even the...
by Watsisname
12 Dec 2018 17:22
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 514
Views: 57156

Science and Astronomy News

I much prefer the Geminids, too.  Every meteor shower has a sort of personality, and the hourly rate isn't everything.   I do like that the Perseids are in the summer, so I can enjoy them the whole (brief) night without needing warm clothes.  But they are annoyingly fast and usually dim.  Even photo...
by Watsisname
10 Dec 2018 23:43
Forum: Science and Astronomy Discussions
Topic: Population Growth and Sustainable Development
Replies: 52
Views: 471

Population Growth and Sustainable Development

Oh ok, just making sure. :)  A year or so ago I read a fairly thick tome reviewing the development of the first atomic bombs .  For most of the book it goes through the development of the physics by the scientists at Los Alamos in great detail.  It was surprisingly fascinating.  And then at the end ...
by Watsisname
10 Dec 2018 23:18
Forum: Science and Astronomy Discussions
Topic: Population Growth and Sustainable Development
Replies: 52
Views: 471

Population Growth and Sustainable Development

To be clear, I never meant that nuclear weapons are not terrible. 25297 In the far distant future perhaps, the ultimate source of energy will be matter-antimatter interactions which will result in a 100% conversion of matter into energy. Probably not, because you have to put the same or even more en...
by Watsisname
10 Dec 2018 20:27
Forum: Science and Astronomy Discussions
Topic: Population Growth and Sustainable Development
Replies: 52
Views: 471

Population Growth and Sustainable Development

Yep!  Fusion within a plasma is a very delicate process that cannot simply runaway in the environment if control was lost or containment failed.  It's similar to the counter-intuitive effect of breaking a plasma globe.  Just looking at one, it might seem pretty scary, with all these very high-voltag...
by Watsisname
10 Dec 2018 05:27
Forum: Off-topic Discussions
Topic: Unusual weather
Replies: 247
Views: 45288

Unusual weather

Winter is definitely here:

Image

A meter to fall in the mountains over the next 72 hours.  And after that, it keeps going:

Image
by Watsisname
10 Dec 2018 05:19
Forum: Science and Astronomy Discussions
Topic: Population Growth and Sustainable Development
Replies: 52
Views: 471

Population Growth and Sustainable Development

25248 Even if there is some support for nuclear power, there still is this not in my neighbourhood problem.  How about this taboo: Could they be placed next to or even inside, to the degree the infrastructure can be allowed, national parks? Personally I would be against placing them in national par...
by Watsisname
10 Dec 2018 02:18
Forum: Science and Astronomy Discussions
Topic: Population Growth and Sustainable Development
Replies: 52
Views: 471

Population Growth and Sustainable Development

25240 Why were there so many concerns about the radiation making it to the west coast and contaminating the fruit and such for months though?  Because it makes good click-bait!   You can also probably find reports of people detecting radiation along the beaches.  Little if any of those detections w...
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