Remembering is obedience. You are welcome Al, it was humbling and encouraging for all of us, me included! Please pray the Lord will provide more of these opportunities in the few days that remain before the event. Thank you!
Also, I do some “voice” impersonations in here, a few of Carl Sagan. After I listened to it, I sounded like I was mocking Dr. Sagan. I was not. Not at all. I did not mean to. Sagan is partly why I developed a fondness for the heavens and astronomy. I love to do impersonations, too. I was nervous though, and tried doing Dr. Sagan’s voice but it came out of me with no forewarning and no context for the audience. Just sounds like I’m mocking him, but I am not, I can assure you. My apologies to all who might have thought that. DR
Oh, and one more thing! Wish I would have thought about this on the spot, but alas.
Someone during the presentation asked me how light goes through mass. I am not a scientist, but only trying to convey what science I have read. There were a host of examples I could have come up with, but in the moment, I was A) nervous and admittedly befuddled, and B) thinking only of the way in which galaxy clusters warp space-time fabric, failing to pull from a host of simpler examples.
The first example I thought of later was how you can shine a flashlight through your hand. Your hand is made of stuff, but visible light nonetheless penetrates it.
X-ray light does this too. It passes through “solid” objects to reveal what is on the inside.
The short “science” answer is that some wavelengths of light can pass through “solid” objects, some cannot. Telescopes these days can “see” certain wavelengths of light, invisible to the naked eye, such as microwaves, x-rays, gamma rays, infrared and ultraviolet rays.
“Radio waves” are actually a kind of light, too, a particle/wave at the lower-frequency end of the electromagnetic spectrum. We are inherently familiar with “radio” of course. The signals we receive from distant transmitting stations pass right through the walls of our homes and the doors of our cars.
For galaxy clusters, then, it is a bit easier to see how the light behind them passes through their “mass”, as I was trying to say in the presentation.
But in reality, for me personally, I should have just quoted John 1:5 – “And the light shines in the darkness and the darkness did not comprehend it”!
A good teachable moment and (somewhat embarrassing) learning experience for me, but I am grateful for it!
The Heavens declare the glory of God!!! Thank you for helping is REMEMBER Dan.
Remembering is obedience. You are welcome Al, it was humbling and encouraging for all of us, me included! Please pray the Lord will provide more of these opportunities in the few days that remain before the event. Thank you!
Also, I do some “voice” impersonations in here, a few of Carl Sagan. After I listened to it, I sounded like I was mocking Dr. Sagan. I was not. Not at all. I did not mean to. Sagan is partly why I developed a fondness for the heavens and astronomy. I love to do impersonations, too. I was nervous though, and tried doing Dr. Sagan’s voice but it came out of me with no forewarning and no context for the audience. Just sounds like I’m mocking him, but I am not, I can assure you. My apologies to all who might have thought that. DR
Oh, and one more thing! Wish I would have thought about this on the spot, but alas.
Someone during the presentation asked me how light goes through mass. I am not a scientist, but only trying to convey what science I have read. There were a host of examples I could have come up with, but in the moment, I was A) nervous and admittedly befuddled, and B) thinking only of the way in which galaxy clusters warp space-time fabric, failing to pull from a host of simpler examples.
The first example I thought of later was how you can shine a flashlight through your hand. Your hand is made of stuff, but visible light nonetheless penetrates it.
X-ray light does this too. It passes through “solid” objects to reveal what is on the inside.
The short “science” answer is that some wavelengths of light can pass through “solid” objects, some cannot. Telescopes these days can “see” certain wavelengths of light, invisible to the naked eye, such as microwaves, x-rays, gamma rays, infrared and ultraviolet rays.
“Radio waves” are actually a kind of light, too, a particle/wave at the lower-frequency end of the electromagnetic spectrum. We are inherently familiar with “radio” of course. The signals we receive from distant transmitting stations pass right through the walls of our homes and the doors of our cars.
For galaxy clusters, then, it is a bit easier to see how the light behind them passes through their “mass”, as I was trying to say in the presentation.
But in reality, for me personally, I should have just quoted John 1:5 – “And the light shines in the darkness and the darkness did not comprehend it”!
A good teachable moment and (somewhat embarrassing) learning experience for me, but I am grateful for it!
🙂
DR