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Direct Imaging of Multiple Planets Orbiting the Star HR 8799 — Science

Revision 4a986ad6-364e-40fa-a82f-83b6d8b9c489 · 11/5/2026, 10:48:34 PM UTC
Key
marois2008hr8799
Authors
Marois, Christian; Macintosh, Bruce; Barman, Travis; Zuckerman, B.; Song, Inseok; Patience, Jenny; Lafrenière, David; Doyon, René
Issued
2008-11-28
Type
article-journal
Container
Science
Volume
322
Issue
5906
Pages
1348-1352
Raw CSL JSON
{
  "DOI": "10.1126/science.1166585",
  "URL": "https://arxiv.org/abs/0811.2606",
  "page": "1348-1352",
  "type": "article-journal",
  "issue": "5906",
  "title": "Direct Imaging of Multiple Planets Orbiting the Star HR 8799",
  "author": [
    {
      "given": "Christian",
      "family": "Marois"
    },
    {
      "given": "Bruce",
      "family": "Macintosh"
    },
    {
      "given": "Travis",
      "family": "Barman"
    },
    {
      "given": "B.",
      "family": "Zuckerman"
    },
    {
      "given": "Inseok",
      "family": "Song"
    },
    {
      "given": "Jenny",
      "family": "Patience"
    },
    {
      "given": "David",
      "family": "Lafrenière"
    },
    {
      "given": "René",
      "family": "Doyon"
    }
  ],
  "issued": {
    "date-parts": [
      [
        2008,
        11,
        28
      ]
    ]
  },
  "volume": "322",
  "accessed": {
    "date-parts": [
      [
        2026,
        11,
        5
      ]
    ]
  },
  "container-title": "Science"
}

Claims

  1. High-contrast imaging with adaptive optics at the Keck and Gemini telescopes revealed three planets orbiting HR 8799 at projected separations of 24, 38 and 68 astronomical units, with estimated masses of 5 to 13 Jupiter masses; images taken at different times show all three moving counter-clockwise around the star. Imaging is hard because planets are very close to, and far fainter than, their stars.
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