FrostCloud Forums  

Go Back   FrostCloud Forums > Science/Technology > General Science and Nature

Greetings!

General Science and Nature General discussions on all aspects of science and nature.

Reply
 
Thread Tools Rate Thread Display Modes
  #1  
Old 08-25-2008, 09:33 PM
PoseidonsNet's Avatar
PoseidonsNet PoseidonsNet is offline
Supermarine
 
Join Date: Jul 2008
Location: Africa
Posts: 2,283
Why is the moon red during a lunar eclipse?

The going theory is that this has something to do with the sun's light passing through the earth's atmosphere.


I cannot accept this for a few reasons.

Firstly, during the eclipse, the earth blocks the suns light. So if this red light was coming from the earth, it would have to actually pass through the earth itself.

Secondly, at night on Earth, there is no redness, and the moon is doing just this : being hidden by the Earth's shadow.

Thirdly, the Earth is about 12 000 km wide, whereas the atmosphere is at best 80km thick. Thus this redness would be only be thin sliver of red light.

Fourthly, looking at earth's dark side from space there is no evidence of this redness.







So where does the red come from???





My guess is that this redness is the ambient colour of light emanating from surrounding stars. What else can it be?

Most nearby stars are red dwarfs. But they cannot be seen with the naked eye. Its only the big blue and white ones which are very bright, which we can see.

Most of these nearby red dwarfs on their own are not bright enough to be seen without a telescope.

However, their cumulative redness is a much stronger light source. Together these thousands of little red lights produce enough light to reflect off the moon.

The moon is normally a pale yellow colour.

The ambient red light is just so weak by comparison to the sun, that it just gets drowned out by the suns strong yellow light.





This could be verified/falsified by sending a probe to the moon during an eclipse, and seeing where this red light actually emanates from.

__________________
The Principles of Flight (in full)
http://www.poseidons.net/flight/Principlesofflight.htm
Reply With Quote
Sponsored Links
  #2  
Old 08-25-2008, 10:00 PM
Lys's Avatar
Lys Lys is offline
No, I'm male.
 
Join Date: Aug 2008
Posts: 195
Blog Entries: 5
Quote:
Firstly, during the eclipse, the earth blocks the suns light.
During a lunar eclipse, the moon blocks the sun's light, doesn't it?

Yet you still shouldn't look directly at it, because the light around the edges of the moon will burn your corona - because it doesn't block the sun entirely.

Quote:
So if this red light was coming from the earth, it would have to actually pass through the earth itself.
Or, you know, the atmosphere. Which isn't solid.

Quote:
Secondly, at night on Earth, there is no redness, and the moon is doing just this : being hidden by the Earth's shadow.
Er, no. At night, the moon is not being hidden by Earth's shadow. At night, the sun is on the other side of the planet.

Similarly, the phases of the moon are caused by the relation of the moon's position to the sun's. It has nothing to do with Earth's shadow. And you'll note, the moon's darker parts aren't red, so it's not starshine.

Quote:
Thirdly, the Earth is about 12 000 km wide, whereas the atmosphere is at best 80km thick. Thus this redness would be only be thin sliver of red light.
Again, no. The corona of a lunar eclipse doesn't create a "sliver of white light" on the Earth's surface. The corona lights up everywhere on the Earth's surface that the eclipse covers. Same thing.

Quote:
Fourthly, looking at earth's dark side from space there is no evidence of this redness.
Well (a) the sunlight isn't being directed onto Earth's dark side, especially not through Earth's atmosphere first, and (b) this again negates your starshine theory.
__________________
When you get sad, stop being sad and be awesome instead.
Reply With Quote
  #3  
Old 08-25-2008, 10:34 PM
Lys's Avatar
Lys Lys is offline
No, I'm male.
 
Join Date: Aug 2008
Posts: 195
Blog Entries: 5
Sorry, I made a few mistakes:
"During a lunar eclipse, the moon blocks the sun's light, doesn't it?"
Should be:
"During a solar eclipse, the moon blocks the sun's light, doesn't it?"

And:
"The corona of a lunar eclipse doesn't create a "sliver of white light" on the Earth's surface."
Should be:
"The corona of a solar eclipse doesn't create a "sliver of white light" on the Earth's surface."

I'm tired, my bad.
__________________
When you get sad, stop being sad and be awesome instead.
Reply With Quote
  #4  
Old 08-26-2008, 02:09 AM
QUEST? QUEST? is offline
sailor
 
Join Date: Mar 2007
Location: long island n.y.
Posts: 655
refraction!!!
Reply With Quote
  #5  
Old 08-26-2008, 08:39 AM
Symptom777's Avatar
Symptom777 Symptom777 is offline
Symptom of the Universe
 
Join Date: Mar 2004
Location: Netherlands
Posts: 18,001
Blog Entries: 12
Quote:
Originally Posted by PoseidonsNet View Post
The going theory is that this has something to do with the sun's light passing through the earth's atmosphere.


I cannot accept this for a few reasons.
Unfortunately these are not reasons, these are the insane ramblings of a deranged mind.

You are a total friggin moron and should be shot.
Reply With Quote
  #6  
Old 08-26-2008, 11:13 PM
PoseidonsNet's Avatar
PoseidonsNet PoseidonsNet is offline
Supermarine
 
Join Date: Jul 2008
Location: Africa
Posts: 2,283
Quote:
Originally Posted by Lys View Post
During a lunar eclipse, the moon blocks the sun's light, doesn't it?

Yet you still shouldn't look directly at it, because the light around the edges of the moon will burn your corona - because it doesn't block the sun entirely.

Or, you know, the atmosphere. Which isn't solid.

Er, no. At night, the moon is not being hidden by Earth's shadow. At night, the sun is on the other side of the planet.

Similarly, the phases of the moon are caused by the relation of the moon's position to the sun's. It has nothing to do with Earth's shadow. And you'll note, the moon's darker parts aren't red, so it's not starshine.

Again, no. The corona of a lunar eclipse doesn't create a "sliver of white light" on the Earth's surface. The corona lights up everywhere on the Earth's surface that the eclipse covers. Same thing.

Well (a) the sunlight isn't being directed onto Earth's dark side, especially not through Earth's atmosphere first, and (b) this again negates your starshine theory.
No worries about the dyslexia lys, at least you know enough to go back and check.

As for the little boy, "that which comes out of your mouth defiles you".
Symptom, you make dragon seem like a smart guy. Well done. He may be misiniformed about 90% of the time, but he at least tries to debate in a rational manner, and his posts improve over time, whereas yours degenerate with each passing day. Get help.



The lunar eclipse is caused by the earths shadow.
Now if this shadow were red,
then the redness would be evident before it struck the moon.
But its not.
__________________
The Principles of Flight (in full)
http://www.poseidons.net/flight/Principlesofflight.htm
Reply With Quote
  #7  
Old 08-27-2008, 11:04 AM
Symptom777's Avatar
Symptom777 Symptom777 is offline
Symptom of the Universe
 
Join Date: Mar 2004
Location: Netherlands
Posts: 18,001
Blog Entries: 12
Quote:
Originally Posted by PoseidonsNet View Post
Now if this shadow were red,
then the redness would be evident before it struck the moon.
Of course, we could see it reflected on Mars, I suppose.
Which is red.
Reply With Quote
  #8  
Old 08-27-2008, 11:29 PM
Lys's Avatar
Lys Lys is offline
No, I'm male.
 
Join Date: Aug 2008
Posts: 195
Blog Entries: 5
Quote:
The lunar eclipse is caused by the earths shadow.
Now if this shadow were red,
then the redness would be evident before it struck the moon.
But its not.
The lunar eclipse is caused by the Earth occluding the sun.

However the Earth does not occlude all the light, and what light it doesn't occlude passes through the Earth's atmosphere giving the Earth a small corona from the moon's viewpoint.

This light is what gives it the red tint.
__________________
When you get sad, stop being sad and be awesome instead.
Reply With Quote
  #9  
Old 08-30-2008, 09:26 PM
PoseidonsNet's Avatar
PoseidonsNet PoseidonsNet is offline
Supermarine
 
Join Date: Jul 2008
Location: Africa
Posts: 2,283
Quote:
The lunar eclipse is caused by the Earth occluding the sun.

However the Earth does not occlude all the light, and what light it doesn't occlude passes through the Earth's atmosphere giving the Earth a small corona from the moon's viewpoint.

This light is what gives it the red tint.
Yes, this is the accepted theory.
But, if this were so, our night sky would be red.

We cannot see any red at night, not normally, or from a jet, or from space.

So the theory suggests that the red light SUDDENLY just appears during the lunar eclipse. Normally it is not there.

All light HAS to be seen emanating from its source. IE the Earth's atmosphere. Not so?

It cannot just sort of appear, half way between the earth and moon, and be invisible from the Earth, except when it reflects off the moon.

There are no reports of any red light coming off the Earth's atmosphere from astronauts.

Stop just following the herd. Think about it.
__________________
The Principles of Flight (in full)
http://www.poseidons.net/flight/Principlesofflight.htm
Reply With Quote
  #10  
Old 08-31-2008, 04:28 PM
Symptom777's Avatar
Symptom777 Symptom777 is offline
Symptom of the Universe
 
Join Date: Mar 2004
Location: Netherlands
Posts: 18,001
Blog Entries: 12
you are more stupid than a really, really stupid thing.
Reply With Quote
  #11  
Old 08-31-2008, 08:35 PM
PoseidonsNet's Avatar
PoseidonsNet PoseidonsNet is offline
Supermarine
 
Join Date: Jul 2008
Location: Africa
Posts: 2,283
Quote:
Originally Posted by Symptom777 View Post
you are more stupid than a really, really stupid thing.
And you are more color blind than a bat without any ears!
__________________
The Principles of Flight (in full)
http://www.poseidons.net/flight/Principlesofflight.htm
Reply With Quote
  #12  
Old 09-01-2008, 09:51 AM
Lys's Avatar
Lys Lys is offline
No, I'm male.
 
Join Date: Aug 2008
Posts: 195
Blog Entries: 5
Quote:
But, if this were so, our night sky would be red.
No it wouldn't. For our night sky to be red, it would require light to do a complete 180 degree turn after passing through our atmosphere.

Quote:
All light HAS to be seen emanating from its source. IE the Earth's atmosphere. Not so?
You mean the way the sky turns red at sunrise and sunset, when people can actually see the point of changeover between night and day? That sort of seeing it emanating from its source?

Quote:
It cannot just sort of appear, half way between the earth and moon, and be invisible from the Earth, except when it reflects off the moon.
It doesn't just sort of appear.

You have to remember that light moves in a straight line. So unless it bounces off something first (ie, during an eclipse where it bounces off the moon), or you're at a position where the light is moving by (ie, sunrise and sunset, where the Earth is beginning to occlude the sun from us), you won't see it.

Quote:
There are no reports of any red light coming off the Earth's atmosphere from astronauts.
Again, we have the issue of "light moves in a straight line". For astronauts to report that, there'd have to be some way of bending the light around the atmosphere after it passed through it.

It's all fairly basic physics.
__________________
When you get sad, stop being sad and be awesome instead.
Reply With Quote
  #13  
Old 09-01-2008, 11:23 PM
PoseidonsNet's Avatar
PoseidonsNet PoseidonsNet is offline
Supermarine
 
Join Date: Jul 2008
Location: Africa
Posts: 2,283
Quote:
All light HAS to be seen emanating from its source. IE the Earth's atmosphere. Not so?

You mean the way the sky turns red at sunrise and sunset, when people can actually see the point of changeover between night and day? That sort of seeing it emanating from its source?
Not all sunsets and sunrises are red. (Unless you live in smoggy city)
All lunar eclipses are red.



Quote:
You have to remember that light moves in a straight line. So unless it bounces off something first (ie, during an eclipse where it bounces off the moon), or you're at a position where the light is moving by (ie, sunrise and sunset, where the Earth is beginning to occlude the sun from us), you won't see it.
If you cannot see the light then it is not there!
__________________
The Principles of Flight (in full)
http://www.poseidons.net/flight/Principlesofflight.htm
Reply With Quote
  #14  
Old 09-02-2008, 03:48 AM
Lys's Avatar
Lys Lys is offline
No, I'm male.
 
Join Date: Aug 2008
Posts: 195
Blog Entries: 5
Quote:
Not all sunsets and sunrises are red. (Unless you live in smoggy city)
All lunar eclipses are red.
No, sometimes they're pink. The point remains that the colour of the light changes at these times for exactly the same reason the moon turns red.

In fact, the fact that you brought up smog kinda proves the point. It's the heavy particles in the atmosphere that do the tinting - and the light travels through more atmosphere to reach the moon than it does to hit you on the ground.

Quote:
If you cannot see the light then it is not there!
Or it's just not directed at you.

Unless you're suggesting that the other side of the sun is completely dark?
__________________
When you get sad, stop being sad and be awesome instead.
Reply With Quote
  #15  
Old 09-02-2008, 10:15 AM
Symptom777's Avatar
Symptom777 Symptom777 is offline
Symptom of the Universe
 
Join Date: Mar 2004
Location: Netherlands
Posts: 18,001
Blog Entries: 12
Well, Lys, 10/10 for trying but PoseidondsNut is mentally deranged.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
The Moon Cleft Asunder brainstrom Space and Time 17 03-12-2009 06:11 PM
Giant Telescope Mirrors For The Moon Could Be Made With Carbon, Epoxy And Lunar Dust NewsFeed Space and Time News Feeds 0 06-09-2008 03:00 PM
Did We Really Go to the Moon? Cosmored Off-topic 79 05-12-2008 10:27 PM
Atheists trolling a Religion forum Spamming it Mike Dubbeld Religion 61 01-18-2007 07:17 AM
Fear over Jerusalem Star? IamJoseph Religion 1 12-06-2005 04:18 AM


All times are GMT +1. The time now is 11:43 AM.



Powered by: vBulletin
Copyright 2000-2008 Jelsoft Enterprises Limited
Hosted and Maintained by The IceStorm Network