Skip to comments.
Manhole Covers in Space
Strange Horizons ^
| 6/27/2009
| By Debbie Moorhouse
Posted on 06/27/2009 11:13:51 PM PDT by ErnstStavroBlofeld
click here to read article
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-80, 81-96 next last
To: JRandomFreeper
Again, thanks. I will find it.
21
posted on
06/27/2009 11:41:27 PM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: sonofstrangelove
...the results of a simulation, that may not of been a good model...May not of?
22
posted on
06/27/2009 11:43:56 PM PDT
by
Petronski
(In Germany they came first for the Communists, And I didn't speak up because I wasn't a Communist...)
To: sonofstrangelove
Urban LegendIf the nuclear blast didn't vaporize it, traveling at escape velocity through our thick atmosphere most certainly would.
23
posted on
06/27/2009 11:44:06 PM PDT
by
eclecticEel
(The Most High rules in the kingdom of men ... and sets over it the basest of men.)
To: Redcloak
It appears it appears impossible for it to retain much of its initial velocity while passing through the atmosphere. A ground launched hypersonic projectile has the same problem with maintaining its velocity that an incoming meteor has. According to the American Meteor Society Fireball and Meteor FAQ meteors weighing less than 8 tonnes retain none of their cosmic velocity when passing through the atmosphere, they simply end up as a falling rock. Only objects weighing many times this mass retain a significant fraction of their velocity
24
posted on
06/27/2009 11:44:27 PM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: eclecticEel
Yes, but it fun to chat about it.
25
posted on
06/27/2009 11:45:00 PM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: eclecticEel
Its fun to speculate about such things.
26
posted on
06/27/2009 11:46:45 PM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: Redcloak; Axenolith
Possibly -- calculations differ, the object is seen in only one frame and some aver that the whole bomb could not have imparted enough kinetic energy to the plate to get it to leave even an airless earth permanently. Seems the V
2 factor of kinetic energy ups the ante rather rapidly. (Drive car four times as fast, require sixteen times as much kinetic energy to get it up to that speed.)
But I would also expect a hurtling disc would have rapidly begun to fly like a Frisbee, and that would ease its passage through the air. If not leaving Earth, it might have sailed out of the state, eventually falling into a body of water or a woods or somewhere else it would be regarded as just another piece of junk.
27
posted on
06/27/2009 11:55:49 PM PDT
by
HiTech RedNeck
(Don't blame me -- I use Linux.)
To: sonofstrangelove
If it came down somebody would have reported it.I take it you've never been to the Nevada desert.
28
posted on
06/28/2009 12:09:54 AM PDT
by
xjcsa
(Currently shouting "I told you so" about Michael Steele on my profile page.)
To: sonofstrangelove
"If it came down somebody would have reported it." Not if it came down on that person.
29
posted on
06/28/2009 12:10:38 AM PDT
by
spokeshave
(USA #1; Pirates -3...Voting them all out of office would be a sufficient pay cut)
To: xjcsa
There are still a lot of bases out there. One comes in mind Nellis.
30
posted on
06/28/2009 12:11:40 AM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: sonofstrangelove
"The first man-made object sent into space was a manhole cover which by now has travelled well past Pluto!" I would highly doubt the Pluto part. A nuclear blast would seem powerful enough to launch a tiny object into orbit, maybe a lot of them really.... interesting. But weren't these tests done in the desert? or out at sea?
31
posted on
06/28/2009 12:11:56 AM PDT
by
GeronL
(http://libertyfic.proboards.com <----go there now,----> tyrannysentinel.blogspot.com)
To: xjcsa
You have the Groom lake facility and there are a fair amount of radiation devices out there too that need checking and calibrating
32
posted on
06/28/2009 12:13:18 AM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: GeronL
I agree with you. The Pluto part is impossible. These tests were done out in the DOE Nevada Site.
33
posted on
06/28/2009 12:14:37 AM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: xjcsa
Plus you have a lot of seismic devices that are out there. Nevada is seismically active.
34
posted on
06/28/2009 12:17:00 AM PDT
by
ErnstStavroBlofeld
(A leader does not deserve the name unless he is willing occasionally to stand alone-Henry Kissinger)
To: sonofstrangelove
Are you suggesting that if the disk fell back into the desert, it would have shown up as a seismic vibration? Or that the seismic devices were manned so that the desert was filled with many observers?
35
posted on
06/28/2009 12:35:12 AM PDT
by
HiTech RedNeck
(Don't blame me -- I use Linux.)
To: sonofstrangelove
And what if it Frisbee’d itself clear out of the desert?
36
posted on
06/28/2009 12:37:13 AM PDT
by
HiTech RedNeck
(Don't blame me -- I use Linux.)
To: Navy Patriot
It would be an interesting experiment to deliberately drop a manhole cover over the desert from the estimated height (less than 100 miles, the Space Shuttle goes much higher) and track what happens to it
I dropped a shot put from 1000’. After some searching I found a perfectly vertical “gopher hole”. I reached down all the way to my armpit and touched the shot put with my fingers at the bottom of the hole.
37
posted on
06/28/2009 12:39:35 AM PDT
by
kik5150
To: sonofstrangelove
Aerodynamically incorrect, thus a myth.
I know there are quite a few "Hold m'beer, watch this" moments ... this ain't one of them.
It's like trying to start a fire with water ... after all both hydrogen and oxygen are flammable and explosive, right?
38
posted on
06/28/2009 12:40:26 AM PDT
by
knarf
(I say things that are true ... I have no proof ... but they're true)
To: Redcloak
At that velocity, wouldnt it have burned up in the earths atmosphere like a meteor? You got it. This problem is among the much discussed flaws in Jules Verne's conception of a ballistic launch into space from a canon.
Of course, on entry to the atmosphere from space, the thin upper atmosphere is encountered first. Starting from the ground, it's problematical how an object can even be given an initial velocity on the order of escape velocity, and supposing that it could, it's initial encounter with the dense lower layer of the troposphere would be inconceivably violent.
39
posted on
06/28/2009 1:00:49 AM PDT
by
dr_lew
To: dr_lew
An escape velocity in ground level atmosphere would mean instant plasma, no? Forget about higher layers. The film would have shown, not a dark object, but a fireball.
40
posted on
06/28/2009 1:05:29 AM PDT
by
HiTech RedNeck
(Don't blame me -- I use Linux.)
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-80, 81-96 next last
Disclaimer:
Opinions posted on Free Republic are those of the individual
posters and do not necessarily represent the opinion of Free Republic or its
management. All materials posted herein are protected by copyright law and the
exemption for fair use of copyrighted works.
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson