Search found 1709 matches

by Tom Ligon
Fri Jul 21, 2017 1:38 pm
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

Against the cold background of space IR should work splendidly . As of 2017, the Voyager 1 space probe is about 19 billion kilometers away from Terra and its heat signal is a pathetic 20 watts But as faint as it is, the Green Bank telescope can pick it out from the background noise in one second fl...
by Tom Ligon
Fri Jul 21, 2017 1:59 am
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

10 uM is indeed a fun part of the spectrum, and thermal imagers have too many uses to list. I've tracked down electrical shorts and spotted leaks. Also where the cat threw up. But getting back to satellite junk, is IR the way to spot it? Using a space telescope, I can imagine that planets might be r...
by Tom Ligon
Wed Jul 19, 2017 4:00 am
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

As a kid, I used to worry that somehow people might see my farts. We now have the technology. My little home survey camera is sufficiently sensitive to show the difference between my bee-stung hand and the other hand. The stung area felt warmer, and the camera verified it. It will show a 0.1C temper...
by Tom Ligon
Mon Jul 17, 2017 7:18 pm
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

I only have the single-band instrument, which works at around 10 microns, IIRC. That makes it a good instrument for seeing water vapor. It can image clouds in the dark, and steam looks like flames. But it also blinds it under humid conditions. FLIR has another one out that works in a band sensitive ...
by Tom Ligon
Mon Jul 17, 2017 5:25 pm
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

I've played with the thermal imager a lot. Pointing it to the sky can be quite an education. The full moon should be quite toasty, as much as 123 C (253 F). Yet, the thermal imager has trouble picking it up. The first time I tried it, I got no indication at all. That was a summer observation. I trie...
by Tom Ligon
Mon Jul 17, 2017 5:11 pm
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

I have heard that bees body heat is also used to defend their hive. If an intruder inters the hive, the bees will surround the intruder and raise their body temperature, effectively baking the intruder in a bee oven. With the additional advantage that the bees live thru this. If they sting, they di...
by Tom Ligon
Sun Jul 16, 2017 11:04 pm
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

One of its most amusing moments is when Nobel Prize winner and chief scientist John Mather considers whether Webb's optics could sense the heat energy of a bumblebee at a distant equivalent to that of the Moon. It could, he concludes: "You have to take a time exposure to get something that sen...
by Tom Ligon
Tue Jul 11, 2017 7:37 pm
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

This beekeeper suspects Heinlein and Hollywood have missed the truth about hive minds entirely. Bees don't have a "hive mind," just 60,000 intelligent decision-makers all motivated to do some common good for their own home. They just reach a consensus. If we could learn to .... My understa...
by Tom Ligon
Tue Jul 11, 2017 7:23 pm
Forum: General
Topic: Beam me up Scotty!
Replies: 1
Views: 58

Re: Beam me up Scotty!

Just thinking of all those times, when I was a boy, that I shined a flashlight up at the sky and thought about all those photons I was sending off to the moon or the stars. Since photons travel at the speed of light, time does not pass for them. That's kind of teleporting, right? Let me know when th...
by Tom Ligon
Tue Jul 11, 2017 1:00 am
Forum: General
Topic: Stuff in Space
Replies: 28
Views: 376

Re: Stuff in Space

But don't you think truly intelligent life would manage the junk? There as the bro-haha a few months back, the speculation that a pattern of light dropouts around one star might mean they had a Ringworld under construction. The methodology required for detecting small bodies orbiting planets around ...
by Tom Ligon
Thu Jul 06, 2017 5:00 pm
Forum: General
Topic: Attn: Tom Ligon
Replies: 13
Views: 490

Re: Attn: Tom Ligon

To which I can add that Dr. Park is a meticulous scientist . Much as I liked working for Dr. Bussard, he was clearly very much in love with his concept. While the broad strokes of his approach felt right, the theoretical basis had some holes that needed data. Computers at the time were not capable o...
by Tom Ligon
Wed Jul 05, 2017 1:39 pm
Forum: General
Topic: Attn: Tom Ligon
Replies: 13
Views: 490

Re: Attn: Tom Ligon

No, I don't know Mark personally. Several years ago, Jerry Pournelle, whom I know pretty well, was participating in a discussion with the SIGMA think tank on the subject of the threat of AIs to humanity's future. Jerry has apparently been a fan for years, and told us we should read it. He thought th...
by Tom Ligon
Tue Jul 04, 2017 7:13 pm
Forum: General
Topic: Attn: Tom Ligon
Replies: 13
Views: 490

Re: Attn: Tom Ligon

Taliesin,

Welcome aboard ... first time I've seen your name here.

What brings you to TalkPolywell? Your name suggests a Frank Lloyd Wright connection. An intrest in Freefall suggests a hard science fiction interest.

Tom
by Tom Ligon
Fri Jun 23, 2017 10:03 pm
Forum: General
Topic: Crime and Punishment: Oklahoma (& Texas) style!
Replies: 789
Views: 55225

Re: Crime and Punishment: Oklahoma (& Texas) style!

The rifle used fires the Browning .50 cal, but it is not the Barrett. I think I need one of these. What a plinking rifle! Keep the tin can population under control. McMillan TAC-50. At 26 pounds, this is no hunting rifle. http://a57.foxnews.com/images.foxnews.com/content/fox-news/us/2017/06/22/canad...
by Tom Ligon
Fri Jun 23, 2017 3:30 am
Forum: General
Topic: Crime and Punishment: Oklahoma (& Texas) style!
Replies: 789
Views: 55225

Re: Crime and Punishment: Oklahoma (& Texas) style!

This is military, not civilian, but it bears on gun control: hitting what you aim at.

This ups the bar on marksmanship by a whole kilometer.

http://www.foxnews.com/us/2017/06/22/ca ... ghter.html

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