NASA Starshade Would Enable Astronomers To Directly Image Rocky Exoworlds

Innovative NASA-funded orbital starshade could help capture first direct images from extrasolar earths.

The top 3

  1. Extreme Brightness Contrast with Host Star: Exoplanets are millions to billions of times fainter than their host stars, making it like trying to spot a firefly next to a powerful spotlight.
  2. Tiny Angular Separation from Host Star: Planets orbit extremely close to their stars from our vantage point, making it difficult to resolve them as separate objects even with powerful telescopes.
  3. Starlight Diffraction and Speckle Noise: Even with coronagraphs to block direct starlight, light diffracts around telescope optics, creating 'speckles' that can mimic or obscure faint planetary signals.

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