CITATION — REFERENCE ENTRY
Prevalence of Earth-size planets orbiting Sun-like stars — Proceedings of the National Academy of Sciences
- Key
- petigura2013prevalence
- Authors
- Petigura, Erik A.; Howard, Andrew W.; Marcy, Geoffrey W.
- Issued
- 2013-11-26
- Type
- article-journal
- Container
- Proceedings of the National Academy of Sciences
- Volume
- 110
- Issue
- 48
- Pages
- 19273-19278
Raw CSL JSON
{
"DOI": "10.1073/pnas.1319909110",
"URL": "https://arxiv.org/abs/1311.6806",
"page": "19273-19278",
"type": "article-journal",
"issue": "48",
"title": "Prevalence of Earth-size planets orbiting Sun-like stars",
"author": [
{
"given": "Erik A.",
"family": "Petigura"
},
{
"given": "Andrew W.",
"family": "Howard"
},
{
"given": "Geoffrey W.",
"family": "Marcy"
}
],
"issued": {
"date-parts": [
[
2013,
11,
26
]
]
},
"volume": "110",
"accessed": {
"date-parts": [
[
2026,
11,
5
]
]
},
"container-title": "Proceedings of the National Academy of Sciences"
}
Claims
-
Searching Kepler data for 42,000 Sun-like stars, the authors found 603 planets, 10 of them Earth-size (1–2 Earth radii) and receiving comparable starlight. Correcting for missed planets, they estimate 11 ± 4% of Sun-like stars have an Earth-size planet receiving 1–4 times Earth's starlight; extrapolating to longer orbits, 22 ± 8% have one in the habitable zone (0.25–4 times Earth's starlight), and the nearest may lie within 12 light-years.
-
The authors note that the extrapolation carries less weight than a direct measurement, that habitability depends on planet-specific properties, and that their flux-based habitable zone includes Venus and Mars, which have no surface liquid water today.
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