Why does gravitational lensing "magnify" an object's light?
I understand that different light particles reach edge of a gravitational lensing object at different times or different angles and it is bent in space curvature and reflected with direction change but why is there magnification? Is it because space is curved just like a magnifying glass is and so similar to a magnifying glass image is magnified?
Does anyone remember the fanfiction written by greenfire87? This fanfiction was just so good and it has completely disappeared. I tracked down a copy but I was wondering if I am the only one!
Link link to pdfs
Is it possible for the image of a galaxy to be turned around or mirrored by a gravitational lense so that an observer might see the state of their own galaxy billions of years ago?
The purpose of this post is to point out the connection between UAPtheory.com's explanation of "gravitational lensing" which is an expected characteristic of authentic UAP and the Beaver, Utah "Tic Tac" style UAP video.
As background, a hi resolution video was captured of an alleged UAP near Beaver, Utah in 2016. You can familiarize yourself with that here or watch the gif below.
https://i.redd.it/z03ymyla1ha71.gif
Here is a close up .gif of the object moving at high speed toward the drone camera, which was flying in the direction of the mountains.
https://i.redd.it/zf2xhu81xga71.gif
You can see this greatly resembles the tic-tac UAP that has become famous in the media and corroborated by trained witnesses, etc etc.
According to UAPtheory.com, due to the nature of the propulsion system, authentic UAP should display what is called gravitational lensing. Essentially, this is light distortion around the object because the object is altering gravity to move - light is bent around it because gravity affects the light around the object.
Further, UAPtheory.com explains that gravitational lensing may change in how it appears when craft changes trajectory - so the shape of the object may appear to change as well. Well, the Beaver, Utah UAP video follows this explanation to a tee.
Below is a gif with three frames highlighted, paused for 5 seconds each. The first displays a consistent tic-tac shape, vertically oriented. Then, as the craft begins a turn - we have several frames where the craft appears to bend and buckle in the middle, or, evidence of gravitational lensing! Finally, once the craft completes its trajectory change - it becomes a horizontal tic tac shape.
https://i.redd.it/0qcm6kf51ha71.gif
I believe the Beaver, Utah footage is an authentic UAP. And it excites me that this "unified theory" of UAP behavior can explain characteristics of encounters going back years. I do not believe UAPtheory.com was around when this video was shot and released, so it would be difficult to include this light-bending, gravitational lens characteristics at the time simply because it was not a known or theorized (popularly at least) characteristic of UAP.
That's all I got, folks. Please discuss be
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How are distances calculated for gravitationally-lensed objects, or rhe objects behind the "lens"?
We are a bunch of cosmologists from the Cosmology from Home 2020 conference. Ask us anything, from our daily research to the organization of a large conference during COVID19! We have some special experts on
- Inflation: The mind-bogglingly fast expansion of the Universe in a fraction of the first second. It turned tiny quantum fluctuation into the seeds for the galaxies and clusters we see today
- The Cosmic Microwave background: The radiation reaching us from a few hundred thousand years after the Big Bang. It shows us how our universe was like, 13.4 billion years ago
- Large Scale Structure: Matter in the Universe forms a "cosmic web" with clusters, filaments and voids. The positions of galaxies in the sky shows imprints of the physics in the early universe
- Dark Matter: Most matter in the universe seems to be "Dark Matter", i.e. not noticeable through any means except for its effect on light and other matter via gravity
- Gravitational Lensing: Matter in the universe bends the path of light. This allows us to "see" the (invisible) dark matter in the Universe and how it is distributed
- And ask anything else you want to know!
Answering your questions tonight are
- Alexandre Adler: u/bachpropagate I’m a PhD student in cosmology at Stockholm University. I mainly work on modeling sources of systematic errors for cosmic microwave background polarization experiments. You can find me on twitter @BachPropagate.
- Alex Gough: u/acwgough PhD student: Analytic techniques for studying clustering into the nonlinear regime, and on how to develop clever statistics to extract cosmological information. Previous work on modelling galactic foregrounds for CMB physics. Twitter: @acwgough.
- Arthur Tsang: u/onymous_ocelot Strong gravitational lensing and how we can use perturbations in lensed images to learn more about dark matter at smaller scales.
- Benjamin Wallisch: Cosmological probes of particle physics, neutrinos, early universe, cosmological probes of inflation, cosmic microwave background, large-scale structure of the universe.
- Giulia Giannini: u/astrowberries PhD student at IFAE in Spain. Studies weak lensing of distant galaxies as cosmological probes of dark energy.
- Hayley Macpherson: u/cosmohay. Numerical (and general) relativity, and cosmological simulations of large-scale structure formation
- Katie Mack: u/astro_katie. cosmology, dark matter, early universe, black holes, galaxy formation, end of universe
- Robert Lilow: (theoretical models for the)
Mass and energy are the same thing so if you’re moving at a significant portion of lightspeed you are also carrying a great deal of kinetic energy, so does your mass also increase?
Could you move close enough to c that light with distort around you like how it distorts around other supermassive objects like galaxies or black holes?
If lensing does happen, then are there issues with communicating with a spaceship moving close to c?
What would need to be done to use it?
