huge galaxy clusters can act as telescopes, elongating background images of star systems to faint arcs -- a lensing effect
4 Powerful Poems about Parkinson's and Growing Older | Robin Morgan | TED Talks · TED
How native speakers pronounce “arcs”
1 example from real videos — listen, replay, loop.
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huge galaxy clusters can act as telescopes, elongating background images of star systems to faint arcs -- a lensing effect
4 Powerful Poems about Parkinson's and Growing Older | Robin Morgan | TED Talks · TED