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Artist’s Concept of a Transit

A planet passes in front of its host star - a celestial event called a transit. Astronomers used such a transit to examine the gas giant orbiting HD 209458 by probing the star's light passing through the planet's atmosphere.
  • Release Date
    November 27, 2001
  • Science Release
    Hubble Makes First Direct Measurements of Atmosphere on World Around another Star
  • Credits
    B. Preston (Max-Q Digital, STScI)

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Last Updated
Mar 14, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov