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Originally posted by amitheone
At 4:18 No Stars :
"The stars were missing from the black lunar skies"
Obviously you can't see any stars at this perspective due to the contrast. Everything is so bright. This is the day side of the moon where the sun is shining brightly. You'll only see stars when you are on the night side. Try shining a flashlight towards your eyes in a dark room. Can you see anything? Barely!!
109:20:58 Armstrong: Okay. Can you pull the door open a little more?
109:21:00 Aldrin: All right.
109:21:03 Armstrong: Okay. (Pause)
109:21:07 Aldrin: Did you get the MESA out?
109:21:09 Armstrong: I'm going to pull it now. (Pause)
[Neil is pulling the D-ring which releases the MESA, attached to the side of the LM under Buzz's station, and lets it swing down into an accessible position. Once down on the surface, he can adjust the MESA height if necessary. Training photo S69-31080 (scan by Paolo Dangelo) shows Neil working at the MESA. A drawing of the MESA shows the location of the TV camera which will show Neil's climb down the ladder.]
109:21:18 Armstrong: Houston, the MESA came down all right.
109:21:22 McCandless: This is Houston. Roger. We copy. Standing by for your TV.
109:21:39 Armstrong: Houston, this is Neil. Radio check.
109:21:42 McCandless: Neil, this is Houston. Loud and clear. Break. Break. Buzz, this is Houston. Radio check, and verify TV circuit breaker in.
109:21:54 Aldrin: Roger, TV circuit breaker's in. And read you loud and clear.
Originally posted by badw0lf
That's an outright LIE! Everyone knows you can see stars in broad daylight - Why if I just step outside now and take a look at the mid-afternoon sky I'll... Oh wait, heyyy You're right !!
Originally posted by Elhardt
Also pointed out on that documentary was that a mirror was placed on the Moon and we use that to bounce lasers off of to measure the distance of the moon. So yes, it's a fact, we've been to the moon, and more than once. You only make yourself look uneducated, paranoid and totally irrational when you keep denying we've landed on the moon.
Originally posted by amitheone
"The noise level of a rocket engine is up in the 140-150 decibel range. In other words, enormously loud. How would it be possible to hear astronauts voices against the background of a running rocket engine?"
Sound can travel through any medium, but it cannot travel through a vacuum. There is no sound in outer space. You can't hear any rocket sounds in the moon because of absence of air or a medium. If it were so, then we would be deaf already due to the enormous explosion of the sun.
Originally posted by ilali
So wouldn't sound have travelled through the walls of the capsule?
Originally posted by amitheone
You will only get low frequency vibrations inside the lunar module. If loose objects is on the walls of the capsule, you'll hear the object vibrating instead and the sound transmitted. The actual thundering noise of the rocket will not be heard at all as there's no air. The thundering sound you hear is actually the shearing action between the high velocity exhaust jet and the surrounding atmosphere.
In a vacuum, you only take away the sound, but you don't take away the vibrations. It is still there. You can only feel it but not hear it. It couldn't transmit that frequency due to the absence of air.
Originally posted by amitheone
If you still can't picture this, look at the diagram below:
You have a jar and you have a bell inside. The bell is switched on and you can hear it ringing. Once you pumped out the air from the jar, the ringing sound slowly diminishes and you can't hear it anymore. But, you can still see the bell vibrating. If you touch the base, you can feel it vibrating.
This is what exactly happens on the space capsule. The bell is the rocket and space is the jar without air. You can't hear the rocket, but you can feel its vibration.
You can google it if you want to study this phenomena further.
[edit on 7-12-2007 by amitheone]
Originally posted by ilali
Thank you.
So you cannot hear an outside explosion from inside the capsule.
Could you please explain to me, why in this official document www.hq.nasa.gov...
on page 73 (lower section), they all can HEAR loud noise from the oxygen tank explosion?
8.7.3 Cryogenic Oxygen Tank Incident At approximately 55 hours 54 minutes • a loud noise was heard when the Command Module Pilot was in the left seat, the Commander in the lower equipment bay, and the Lunar Module Pilot in the tunnel. The noise was comparable to that noted in exercising the lunar module repressurization valve. The Command Module Pilot and Lunar Module Pilot also reported a minor vibration or tremor in the spacecraft.
Originally posted by ilali
8.7.3 Cryogenic Oxygen Tank Incident At approximately 55 hours 54 minutes • a loud noise was heard when the Command Module Pilot was in the left seat, the Commander in the lower equipment bay, and the Lunar Module Pilot in the tunnel. The noise was comparable to that noted in exercising the lunar module repressurization valve. The Command Module Pilot and Lunar Module Pilot also reported a minor vibration or tremor in the spacecraft.
or is this tank inside the capsule?
[edit on 7-12-2007 by ilali]
Originally posted by ilali
i know, but the capsule was under pressure, so sound could have travelled there. if the rocket engine is connected to the capsule, shouldn't the vibrations have been able to produce loud noise?