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Interferometry: Combining Telescopes for Clearer Views
- Interferometry links multiple telescopes to act like a single giant telescope.
- The technique measures tiny differences in light waves arriving at each telescope.
- This creates a resolution equal to that of a telescope as large as the distance between them.
- Radio astronomy pioneered interferometry, with arrays like the Very Large Array (VLA).
- The Event Horizon Telescope used interferometry to capture the first black hole image in 2019.
- Optical interferometry is more challenging but reveals fine details of stars and exoplanets.
- Interferometry helps study stellar surfaces, binary systems, and galaxy cores.
- By spreading telescopes across continents, astronomers achieve incredible precision.
- Space-based interferometers could one day directly image Earth-like exoplanets.
- Interferometry turns small instruments into powerful tools for exploring the universe.