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Direct Imaging of Multiple Planets Orbiting the Star HR 8799

Open access
Marois, Christian, Macintosh, Bruce, Barman, Travis, Zuckerman, B., Song, Inseok, Patience, Jennifer, Lafrenière, David, Doyon, René·2008·Science

Abstract

Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter-like planets in wide orbits, can enable detailed characterization of planetary atmospheres, and is a key step toward imaging Earth-like planets. Imaging detections are challenging because of the combined effect of small angular separation and large luminosity contrast between a planet and its host star. High-contrast observations with the Keck and Gemini telescopes have revealed three planets orbiting the star HR 8799, with projected separations of 24, 38, and 68 astronomical units. Multi-epoch data show counter clockwise orbital motion for all three imaged planets. The low luminosity of the companions and the estimated age of the system imply planetary masses between 5 and 13 times that of Jupiter. This system resembles a scaled-up version of the outer portion of our solar system.

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Metadata

Authors
Marois, C., Macintosh, B., Barman, T., Zuckerman, B., Song, I., Patience, J., Lafrenière, D., & Doyon, R.
Venue
Science
Published
2008-11-28
Volume
322
Issue
5906
Pages
1348-1352
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2106723742
Cited by
1,773
References
4
FWCI
71.33
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Direct Imaging of Multiple Planets Orbiting the Star HR 8799. https://app.cochat.ai/papers/10.1126/science.1166585
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Marois, C., Macintosh, B., Barman, T., Zuckerman, B., Song, I., Patience, J., Lafrenière, D., & Doyon, R. (2008). Direct Imaging of Multiple Planets Orbiting the Star HR 8799. Science. https://doi.org/10.1126/science.1166585

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