Notice: We are no longer accepting new posts, but the forums will continue to be readable.
Chapt16.12 Limits of distance that light can travel and be seen; Experiment ; recent asteroid and Russian meteor #1244 New Physics #1364 ATOM TOTALITY 5th ed
Feb 20, 2013 9:43 PM
Chapt16.12 Limits of distance that light can travel and be seen; Experiment ; recent asteroid and Russian meteor encounter
Now I am rather angry with the astronomy community and the word that comes to mind is bonehead, as in boneheaded scientists rather than logical scientists. I have often said that one of the worst science communities that has a thousand assumptions for every fact the arrive at, is astronomy. For example, you ask an astronomy how far away a quasar is, and they confidentially give you a factual answer of 10 billion light years, and they are so confident as they would be of saying how far is Seattle from Boston. What they do not tell you, and why they are so much boneheaded scientists is that in the measurement of 10 billion light years, you omit to tell you of the hundreds if not thousands of assumptions they applied to get 10 billion light years. Whereas the distance from Seattle to Boston had no spurious assumptions. So that if astronomy were to clean up their house and to tell how many assumptions go into their reported facts that pretty much of current day astronomy would be thrown on top of the garbage dump.
I am going to need a full chapter on just the idea that light as a measure of distance in astronomy has an upper limit of distance. If the Observable Universe is 14 billion years old, then we cannot expect to see galaxies at a distance of 14 billion light years away. We can only expect to see galaxies a fraction of 14 billion light years away. What is that fraction?
Well, we all know in physics that light waves dissipate from a source as they travel in Space. We know that a flashlight beam cannot travel 14 billion light years and remain the same beam. So how far can a flashlight beam travel before we can no longer see it. Here is the Experiment:
Obtain a lantern type flashlight and a regular flashlight with its reflector to concentrate the beam and finally obtain a laser light. Hopefully all three are white light, and my laser is a red light so I need to find a white light laser. And hopefully all three are run on the same batteries as power source. Now the Experiment asks you to go out on a dark night with the three lights fixed and asks you to travel away from those lights until you can no longer see them visually. How far will you have to travel? Will you have to travel a 1 kilometer to no longer see the lantern and 1.2 kilometer to no longer see the flashlight and 1.5 kilometer to no longer see the laser?
What happens with distance is the coherence is destroyed and with distance the light waves have dissipated apart and no longer coherent.
So there is a physics equation that relates intensity of light with distance, yet the boneheads of astronomy seem to never have understood that. And that implies that there is an upper limit for seeing stars and even galaxies.
So if the Cosmos, the Observable Universe is 14 billion years old and given our most powerful star or galaxy at what distance would we lose sight of it? Would we lose sight at 3 billion light years? So that all the galaxies that Jarrett and Juric have mapped and all the galactic atlases to date, are they a mapping of galaxies no more than 3 billion light years from Earth?
Now I bring up the recent topic of a asteroid that went traveling inside the orbit of a Earth satellite. This asteroid was large and would cause considerable damage to Earth if it collided into Earth. Luckily it just passed by Earth and exited, but around the same day of the asteroid, a meteor did smack into Earth and landed on some Russian city causing glass to break and people injured. So, here is the questions. Our telescopes can see asteroids of the size that passed by, but sizes smaller than that are not seeable, for about the same but opposite reasons that light has an upper limit of traveling distance. At some measure limit of size, our telescopes cannot see meteors, likewise, what limits the seeing of meteors or asteroids, is the same physics limitations on light waves travelling from a source, for there is a limiting distance to which the light waves have dissipated so much that they can no longer tell anyone at that distance or beyond what the source of that light was. We can no longer see the source.
Google's archives are top-heavy in hate-spew from search-engine- bombing. Only Drexel's Math Forum has done a excellent, simple and fair archiving of AP posts for the past 15 years as seen here: