This simulation shows light falling on the image plane (an imaginary plane passing through the Earth) due to light from a distant star. A small mass moves between Earth and distant star and causes the lensing pattern seen to move across the screen.
<p>This simulation is one of many made during creation of the Australian National University's free online astrophysics courses:
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<a rel="nofollow" class="external free" href="https://www.edx.org/xseries/astrophysics">https://www.edx.org/xseries/astrophysics</a>
<a rel="nofollow" class="external text" href="https://www.youtube.com/channel/UCra3UzQTPZJjhAu1rJfGhtg">Astronomy Simulations</a>
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<bdo lang="en" dir="ltr"><a href="//commons.wikimedia.org/wiki/Commons:YouTube_files" title="Commons:YouTube files">YouTube</a>: <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=gv0Zo3YBgbI"><bdi lang="">Simulation of gravitational lensing image plane</bdi></a> – View/save archived versions on <a rel="nofollow" class="external text" href="https://web.archive.org/web/*/https://www.youtube.com/watch?v=gv0Zo3YBgbI">archive.org</a> and <a rel="nofollow" class="external text" href="https://archive.today/https://www.youtube.com/watch?v=gv0Zo3YBgbI">archive.today</a></bdo>