Short description: Overview of potentially habitable terrestrial exoplanets
This is a list of potentially habitable exoplanets. The list is mostly based on estimates of habitability by the Habitable Exoplanets Catalog (HEC), and data from the NASA Exoplanet Archive. The HEC is maintained by the Planetary Habitability Laboratory at the University of Puerto Rico at Arecibo.[1] There is also a speculative list being developed of superhabitable planets.
Surface planetary habitability is thought to require orbiting at the right distance from the host star for liquid surface water to be present, in addition to various geophysical and geodynamical aspects, atmospheric density, radiation type and intensity, and the host star's plasma environment.[2]
Contents
1List
2Previous candidates
3See also
4References
5External links
List
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries.
This is a list of exoplanets within the circumstellar habitable zone that are under 10 Earth masses and smaller than 2.5 Earth radii, and thus have a chance of being rocky.[3][1] Note that inclusion on this list does not guarantee habitability, and in particular the larger planets are unlikely to have a rocky composition.[4] Earth is included for comparison.
Note that mass and radius values prefixed with "~" have not been measured, but are estimated from a mass-radius relationship.
Object
Star
Star type
Mass (M⊕)
Radius (R⊕)
Density (g/cm3)
Flux (F⊕)
Teq (K)
Period (days)
Distance (ly)
Refs/Notes
Earth
Sun (Sol)
Template:StarG
1.00
1.00
5.514
1.00
255
365.25
0
Reported for reference. Only planet known to support life.[3]
Teegarden's Star b
Teegarden's Star
Template:StarM
≥1.05
~1.02
—
1.15
264
4.91
12.5
Radius is estimated[5][6]
TOI 700 d
TOI 700
Template:StarM
~1.72
1.14
—
0.87
246
37.4
101
Kepler-1649c
Kepler-1649
Template:StarM
~1.20
1.06
—
0.75
237
19.5
301
[7]
TRAPPIST-1d
TRAPPIST-1
Template:StarM
0.39
0.78
3.39
1.12
258
4.05
41
Confirmed to be rocky[8][9]
Luyten b
Luyten's Star
Template:StarM
≥2.89
~1.35
—
1.06
258
18.65
12.3
[10]
LP 890-9 c
LP 890-9
Template:StarM
—
1.37
—
0.91
272
8.46
105
[11]
K2-72e
K2-72
Template:StarM
~2.21
1.29
—
1.30
261
24.2
217
[12]
Gliese 1061 d
Gliese 1061
Template:StarM
≥1.64
~1.16
—
0.69
218
13.0
12
Gliese 1002 b
Gliese 1002
Template:StarM
≥1.08
~1.03
—
0.67
231
10.3
15.8
[13]
Gliese 1061 c
Gliese 1061
Template:StarM
≥1.74
~1.18
—
1.45
275
6.7
12
Kepler-296e
Kepler-296
Template:StarK
~2.96
1.52
—
1.00
276
34.1
737
[1][14]
Wolf 1069 b
Wolf 1069
Template:StarM
≥1.26
~1.08
—
0.65
250
15.6
31.2
[15]
TRAPPIST-1e
TRAPPIST-1
Template:StarM
0.69
0.92
5.65
0.65
230
6.1
41
Confirmed to be rocky[8][9]
Proxima Centauri b
Proxima Centauri
Template:StarM
≥1.27
~1.30
—
0.70
228
11.186
4.25
Affected by solar flare, possibly affected by high radiation[16]
Kepler-442b
Kepler-442
Template:StarK
~2.36
1.35
—
0.70
233
112.3
1193
[1]
Kepler-62f
Kepler-62
Template:StarK
~2.8
1.41
—
0.41
204
267.3
981
[1][17]
TRAPPIST-1f
TRAPPIST-1
Template:StarM
1.04
1.04
3.3±0.9
0.37
200
9.2
41
Confirmed to be rocky[8][9]
Teegarden's Star c
Teegarden's Star
Template:StarM
≥1.11
~1.04
—
0.37
199
11.4
12.5
[5]
Kepler-1229b
Kepler-1229
Template:StarM
~2.54
1.40
—
0.32
213
86.8
865
[1]
Kepler-186f
Kepler-186
Template:StarM
~1.71
1.17
—
0.29
188
129.9
579
[1]
TRAPPIST-1g
TRAPPIST-1
Template:StarM
1.32
1.13
4.186
0.25
182
12.4
41
Confirmed to be rocky[8][9]
Gliese 1002 c
Gliese 1002
Template:StarM
≥1.36
~0.12
—
0.26
182
21.2
15.8
[13]
Kepler-452b
Kepler-452
Template:StarG
~5
1.63
—
1.11
261
384.8
1799
Not confirmed[1][18][19][20][21]
Kepler-62e
Kepler-62
Template:StarK
~4.5
1.61
—
1.15
264
122.4
981
[1][22]
Kepler-1652b
Kepler-1652
Template:StarM
—
1.60
—
0.84
244
38.1
822
Wolf 1061c
Wolf 1061
Template:StarM
≥3.41
~1.60
—
1.30
271
17.9
13.8
[1]
Kepler-1410b
Kepler-1410
Template:StarK
—
1.78
—
1.07
274
60.9
1196
Gliese 667 Cc
Gliese 667 C
Template:StarM
≥3.81
~1.54
—
0.88
277
28.1
23.62
[23][1]
Kepler-1544 b
Kepler-1544
Template:StarK
—
1.78
—
0.84
248
168.8
1092
[1]
Kepler-283c
Kepler-283
Template:StarK
—
1.82
—
0.89
248
92.7
1526
[1]
Ross 508 b
Ross 508
Template:StarM
≥4.00
—
—
1.32
10.8
37
[24]
Kepler-1638b
Kepler-1638
Template:StarG
—
1.87
—
1.39
276
259.3
4973
[25]
Ross 128 b
Ross 128
Template:StarM
≥1.40
~1.80
—
1.48
280
9.87
11.0
[26]
Kepler-440b
Kepler-440
Template:StarK
—
1.91
—
1.44
273
101.1
981
[1]
Gliese 433 d
Gliese 433
Template:StarM
≥5.22
—
—
1.06
36.1
29.6
[1]
Kepler-1653b
Kepler-1653
Template:StarK
—
2.17
—
1.04
258
140.3
2461
Kepler-705b
Kepler-705
Template:StarM
—
2.11
—
0.77
243
56.1
903
K2-332b
K2-332
Template:StarM
—
2.20
—
1.17
17.7
402
[1]
Kepler-155c
Kepler-155
Template:StarM
—
2.24
—
1.05
52.7
957
[1]
TOI-2257 b
TOI-2257
Template:StarM
—
2.20
—
0.74
35.2
188
Highly eccentric[1][27]
Kepler-443b
Kepler-443
Template:StarK
—
2.35
—
0.89
247
177.7
2615
[1]
Kepler-22b
Kepler-22
Template:StarG
—
2.38
—
1.10
261
289.9
635
[1][28]
Kepler-1701b
Kepler-1701
Template:StarK
—
2.22
—
1.42
275
169.1
1904
[1][29]
Kepler-1606b
Kepler-1606
Template:StarG
—
2.07
—
1.64
277
196.4
2710
[30]
K2-9b
K2-9
Template:StarM
—
2.25
—
1.45
279
18.4
270
[1][31]
Gliese 180 c
Gliese 180
Template:StarM
≥6.40
—
—
0.78
239
24.3
39
Not confirmed[1][32]
Gliese 163 c
Gliese 163
Template:StarM
≥6.80
—
—
1.25
277
25.6
49
[1]
Kepler-1540b
Kepler-1540
Template:StarK
—
2.49
—
0.78
250
125.4
799
Kepler-174d
Kepler-174
Template:StarK
—
2.19
—
0.59
206
247.4
1254
[1]
HD 40307 g
HD 40307
Template:StarK
≥7.09
—
—
0.67
226
197.8
42
Not confirmed[1][33]
Kepler-296f
Kepler-296
Template:StarK
—
1.80
—
0.44
225
63.3
737
[1][34]
HIP 38594 b
HIP 38594
Template:StarM
≥8.10
—
—
1.34
60.7
58
[1]
K2-288Bb
K2-288 B
Template:StarM
—
1.91
—
0.44
207
31.4
214
HD 216520 c
HD 216520
Template:StarK
≥9.44
—
—
1.28
154.4
64
[1]
Gliese 3293 d
Gliese 3293
Template:StarM
≥7.60
—
—
0.59
223
48.1
66
[1]
LHS 1140 b
LHS 1140
Template:StarM
6.38
1.64
7.82+0.98−0.88
0.36
214
24.7
49
Confirmed to be rocky[35][36]
Gliese 357 d
Gliese 357
Template:StarM
≥6.10
—
—
0.38
200
55.7
31
Gliese 229 Ac
Gliese 229 A
Template:StarM
≥8.57
—
—
0.44
216
121.9
18.8
Gliese 514 b
Gliese 514
Template:StarM
≥5.20
—
—
0.27
202
140.4
25
Highly eccentric[37]
Gliese 180 d
Gliese 180
Template:StarM
≥7.56
—
—
0.26
106.3
39
[1]
Gliese 625 b
Gliese 625
Template:StarM
≥2.82
—
—
14.628
21.1
Only in HZ if very optimistic models used[38][39][40]
L 98-59 f
L 98-59
Template:StarM
≥2.46
—
—
>1
~280
23.15
34.6
Unconfirmed candidate[41]
Previous candidates
Some exoplanet candidates detected by radial velocity that were originally thought to be potentially habitable were later found to most likely be artifacts of stellar activity. These include Gliese 581 d & g,[42][43][44] Gliese 667 Ce & f,[23][45] Gliese 682 b & c,[32] Kapteyn b,[46][47] and Gliese 832 c.[48]
HD 85512 b was initially estimated to be potentially habitable,[49][50] but updated models for the boundaries of the habitable zone placed the planet interior to the HZ,[51][52] and it is now considered non-habitable.[1] Kepler-69c has gone through a similar process; though initially estimated to be potentially habitable,[53] it was quickly realized that the planet is more likely to be similar to Venus,[54] and is thus no longer considered habitable.[1] Several other planets, such as Gliese 180 b, also appear to be examples of planets once considered potentially habitable but later found to be interior to the habitable zone.[1]
Similarly, Tau Ceti e and f were initially both considered potentially habitable,[55] but with improved models of the circumstellar habitable zone, as of 2022 PHL does not consider either planet potentially habitable.[1] Kepler-438b was also initially considered potentially habitable; however, it was later found to be a subject of powerful flares that can strip a planet of its atmosphere, so it is now considered non-habitable.[1]
K2-3d and K2-18b were originally considered potentially habitable, and the latter remains listed in the HEC,[1] but recent studies have shown them to be gaseous sub-Neptunes and thus unlikely to be habitable.[56][57][58][59][60][61]
KOI-1686.01 was also considered a potentially habitable exoplanet after its detection in 2011, until proven a false positive by NASA in 2015.[62] Several other KOIs, like Kepler-577b and Kepler-1649b, were considered potentially habitable prior to confirmation, but with new data are no longer considered habitable.
See also
References
↑ 1.001.011.021.031.041.051.061.071.081.091.101.111.121.131.141.151.161.171.181.191.201.211.221.231.241.251.261.271.281.291.301.311.321.331.341.351.36"The Habitable Exoplanets Catalog". University of Puerto Rico at Arecibo. https://phl.upr.edu/projects/habitable-exoplanets-catalog.
↑Lammer, H. et al. (2009). "What makes a planet habitable?". The Astronomy and Astrophysics Review17 (2): 181–249. doi:10.1007/s00159-009-0019-z. Bibcode: 2009A&ARv..17..181L. http://veilnebula.jorgejohnson.me/uploads/3/5/8/7/3587678/lammer_et_al_2009_astron_astro_rev-4.pdf. Retrieved 2016-05-03.
↑ 3.03.1Méndez, A.; González-Espada, W. (2016). Searching for Habitable Worlds: An Introduction. IOP Concise Physics. Morgan & Claypool Publishers. p. 1. ISBN 978-1-68174-401-8. https://books.google.com/books?id=bD9iDwAAQBAJ&pg=PP1. Retrieved 28 November 2019.
↑Chen, Jingjing; Kipping, David (2017). "Probabilistic Forecasting of the Masses and Radii of Other Worlds". The Astrophysical Journal834 (1): 17. doi:10.3847/1538-4357/834/1/17. Bibcode: 2017ApJ...834...17C.
↑ 5.05.1Caballero, J. A. et al. (12 June 2019). "The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star" (in en). Astronomy & Astrophysics627: A49. doi:10.1051/0004-6361/201935460. ISSN 0004-6361. Bibcode: 2019A&A...627A..49Z. https://www.aanda.org/articles/aa/pdf/forth/aa35460-19.pdf.
↑"Earth-Size, Habitable Zone Planet Found Hidden in Early NASA Kepler Data". https://exoplanets.nasa.gov/news/1637/earth-size-habitable-zone-planet-found-hidden-in-early-nasa-kepler-data/.
↑ 8.08.18.28.3Delrez, Laetitia et al. (9 January 2018). "Early 2017 observations of TRAPPIST-1 with Spitzer". Monthly Notices of the Royal Astronomical Society475 (3): 3577–3597. doi:10.1093/mnras/sty051. Bibcode: 2018MNRAS.475.3577D.
↑ 9.09.19.29.3Grimm, Simon L. et al. (5 February 2018). "The nature of the TRAPPIST-1 exoplanets". Astronomy & Astrophysics613: A68. doi:10.1051/0004-6361/201732233. Bibcode: 2018A&A...613A..68G.
↑Astudillo-Defru, Nicola; Forveille, Thierry; Bonfils, Xavier; Ségransan, Damien; Bouchy, François; Delfosse, Xavier et al. (2017). "The HARPS search for southern extra-solar planets. XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293". Astronomy and Astrophysics602: A88. doi:10.1051/0004-6361/201630153. Bibcode: 2017A&A...602A..88A. https://www.aanda.org/articles/aa/full_html/2017/06/aa30153-16/aa30153-16.html.
↑Delrez, L. et al. (September 2022). "Two temperate super-Earths transiting a nearby late-type M dwarf". Astronomy & Astrophysics667: A59. doi:10.1051/0004-6361/202244041. Bibcode: 2022A&A...667A..59D.
↑ 13.013.1Suárez Mascareño, A. et al. (November 2022). "Two temperate Earth-mass planets orbiting the nearby star GJ 1002". Astronomy & Astrophysics670: A5. doi:10.1051/0004-6361/202244991.
↑"Confirmed Planet Overview Page: Kepler-296e". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-296 e&type=CONFIRMED_PLANET.
↑Kossakowski, D. et al. (January 2023). "The CARMENES search for exoplanets around M dwarfs, Wolf 1069 b: Earth-mass planet in the habitable zone of a nearby, very low-mass star". Astronomy & Astrophysics670: A84. doi:10.1051/0004-6361/202245322. Bibcode: 2023A&A...670A..84K.
↑Anglada-Escudé, Guillem; Amado, Pedro J.; Barnes, John et al. (2016). "A terrestrial planet candidate in a temperate orbit around Proxima Centauri". Nature536 (7617): 437–440. doi:10.1038/nature19106. PMID 27558064. Bibcode: 2016Natur.536..437A. https://www.nature.com/articles/nature19106.
↑"Confirmed Planet Overview Page: Kepler-62f". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-62 f&type=CONFIRMED_PLANET.
↑"Confirmed Planet Overview Page: Kepler-452 b". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-452 b&type=CONFIRMED_PLANET.
↑"Targets of Note: Kepler-452 b". https://exoplanetarchive.ipac.caltech.edu/docs/kepler452b.html.
↑Mullally, Fergal; Thompson, Susan E.; Coughlin, Jeffrey L.; Burke, Christopher J.; Rowe, Jason F. (2018). "Kepler's Earth-like Planets Should Not be Confirmed without Independent Detection: The Case of Kepler-452b". The Astronomical Journal155 (5): 210. doi:10.3847/1538-3881/aabae3. Bibcode: 2018AJ....155..210M.
↑Burke, Christopher J.; Mullally, F.; Thompson, Susan E.; Coughlin, Jeffrey L.; Rowe, Jason F. (2019). "Re-evaluating Small Long-period Confirmed Planets from Kepler". The Astronomical Journal157 (4): 143. doi:10.3847/1538-3881/aafb79. Bibcode: 2019AJ....157..143B.
↑"Confirmed Planet Overview Page: Kepler-62e". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-62 e&type=CONFIRMED_PLANET.
↑ 23.023.1Feroz, F.; Hobson, M. P. (2014). "Bayesian analysis of radial velocity data of GJ667C with correlated noise: evidence for only two planets". Monthly Notices of the Royal Astronomical Society437 (4): 3540–3549. doi:10.1093/mnras/stt2148. Bibcode: 2014MNRAS.437.3540F.
↑Harakawa, Hiroki et al. (2022). "A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508". Publications of the Astronomical Society of Japan74 (4): 904–922. doi:10.1093/pasj/psac044. Bibcode: 2022PASJ...74..904H.
↑Torres, Guillermo et al. (2017). "Validation of Small Kepler Transiting Planet Candidates in or near the Habitable Zone". The Astronomical Journal154 (6): 264. doi:10.3847/1538-3881/aa984b. Bibcode: 2017AJ....154..264T.
↑Wenz, John (15 November 2017). "A potentially habitable planet has been discovered just 11 light-years away". Astronomy. http://www2.astronomy.com/news/2017/11/a-potentially-habitable-planet-11-light-years-away.
↑Schanche, N. et al. (2022). "TOI-2257 b: A highly eccentric long-period sub-Neptune transiting a nearby M dwarf". Astronomy & Astrophysics657: A45. doi:10.1051/0004-6361/202142280. Bibcode: 2022A&A...657A..45S.
↑"Confirmed Planet Overview Page: Kepler-22 b". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-22 b&type=CONFIRMED_PLANET.
↑"Confirmed Planet Overview Page: K2-9b". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=K2-9 b&type=CONFIRMED_PLANET.
↑ 32.032.1Feng, Fabo et al. (8 January 2020). "Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs". The Astrophysical Journal Supplement Series246 (1): 11. doi:10.3847/1538-4365/ab5e7c. Bibcode: 2020ApJS..246...11F.
↑Díaz, Rodrigo F. et al. (2016). "The HARPS search for southern extra-solar planets". Astronomy & Astrophysics585: A134. doi:10.1051/0004-6361/201526729. Bibcode: 2016A&A...585A.134D.
↑"Confirmed Planet Overview Page: Kepler-296 f". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-296 f&type=CONFIRMED_PLANET.
↑Dickinson, David (19 April 2017). "Welcome to LHS 1140b: A Super-Earth in the Habitable Zone". Sky & Telescope. http://www.skyandtelescope.com/astronomy-news/welcome-lhs-1140b-super-earth-habitable-zone/.
↑Lillo-Box, J.; Figueira, P.; Leleu, A.; Acuña, L.; Faria, J. P.; Hara, N. et al. (2020). "Planetary system LHS 1140 revisited with ESPRESSO and TESS". Astronomy & Astrophysics642: A121. doi:10.1051/0004-6361/202038922. Bibcode: 2020A&A...642A.121L.
↑Damasso, M. et al. (2022), "A quarter century of spectroscopic monitoring of the nearby M dwarf Gl 514", Astronomy & Astrophysics666: A187, doi:10.1051/0004-6361/202243522
↑Suárez Mascareño, A. et al. (2017). "HADES RV Programme with HARPS-N at TNG. V. A super-Earth on the inner edge of the habitable zone of the nearby M dwarf GJ 625". Astronomy and Astrophysics605: A92. doi:10.1051/0004-6361/201730957. Bibcode: 2017A&A...605A..92S. https://www.aanda.org/articles/aa/full_html/2017/09/aa30957-17/aa30957-17.html.
↑LePage, Andrew (22 May 2017). "Habitable Planet Reality Check: Is GJ 625b a Super-Earth or a Super-Venus?". https://www.drewexmachina.com/2017/05/22/habitable-planet-reality-check-is-gj-625b-a-super-earth-or-a-super-venus/.
↑"GJ 625". http://hzgallery.org/3417_2.png.
↑"Comparison of the L 98-59 exoplanet system with the inner Solar System" (in en). https://www.eso.org/public/images/eso2112b/.
↑Robertson, Paul; Mahadevan, Suvrath; Endl, Michael; Roy, Arpita (3 July 2014). "Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581". Science345 (6195): 440–444. doi:10.1126/science.1253253. PMID 24993348. Bibcode: 2014Sci...345..440R.
↑Hatzes, A. P. (2016). "Periodic Hαvariations in GL 581: Further evidence for an activity origin to GL 581d". Astronomy & Astrophysics585: A144. doi:10.1051/0004-6361/201527135. Bibcode: 2016A&A...585A.144H.
↑Dodson-Robinson, Sarah E.; Delgado, Victor Ramirez; Harrell, Justin; Haley, Charlotte L. (2022). "Magnitude-squared Coherence: A Powerful Tool for Disentangling Doppler Planet Discoveries from Stellar Activity". The Astronomical Journal163 (4): 169. doi:10.3847/1538-3881/ac52ed. Bibcode: 2022AJ....163..169D.
↑Robertson, Paul; Mahadevan, Suvrath (October 2014). "Disentangling Planets and Stellar Activity for Gliese 667C". The Astrophysical Journal793 (2): L24. doi:10.1088/2041-8205/793/2/L24. Bibcode: 2014ApJ...793L..24R.
↑Robertson, Paul (11 May 2015). "Stellar activity mimics a habitable-zone planet around Kapteyn's star". The Astrophysical Journal805 (2): L22. doi:10.1088/2041-8205/805/2/L22. Bibcode: 2015ApJ...805L..22R.
↑Bortle, Anna et al. (2021). "A Gaussian Process Regression Reveals No Evidence for Planets Orbiting Kapteyn's Star". The Astronomical Journal161 (5): 230. doi:10.3847/1538-3881/abec89. Bibcode: 2021AJ....161..230B.
↑Gorrini, P. et al. (2022). "Detailed stellar activity analysis and modelling of GJ 832". Astronomy & Astrophysics664: A64. doi:10.1051/0004-6361/202243063.
↑Kaltenegger, L.; Udry, S.; Pepe, F. (2011). "A Habitable Planet around HD 85512?". arXiv:1108.3561 [astro-ph.EP].
↑Mendez, Abel (1 August 2012). "Five Potential Habitable Exoplanets Now" (Press release). Planetary Habitability Laboratory @ UPR Arecibo. Retrieved 4 June 2015.
↑Kopparapu, Ravi Kumar et al. (2013). "Habitable Zones Around Main-Sequence Stars: New Estimates". The Astrophysical Journal765 (2): 131. doi:10.1088/0004-637X/765/2/131. Bibcode: 2013ApJ...765..131K.
↑Mendez, Abel (29 January 2013). "A New Habitable Zone" (Press release). Planetary Habitability Laboratory @ UPR Arecibo. Retrieved 4 June 2015.
↑Barclay, Thomas (2013). "A super-Earth-sized planet orbiting in or near the habitable zone around Sun-like star". The Astrophysical Journal768 (2): 101. doi:10.1088/0004-637X/768/2/101. Bibcode: 2013ApJ...768..101B.
↑Kane, Stephen R. et al. (2013). "A Potential Super-Venus in the Kepler-69 System". The Astrophysical Journal770 (2): L20. doi:10.1088/2041-8205/770/2/L20. Bibcode: 2013ApJ...770L..20K.
↑Mendez, Abel (28 December 2012). "Two Nearby Habitable Worlds?" (Press release). Planetary Habitability Laboratory @ UPR Arecibo. Retrieved 4 June 2015.
↑"Confirmed Planet Overview Page: K2-3d". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=K2-3 d&type=CONFIRMED_PLANET.
↑"Confirmed Planet Overview Page: K2-18 b". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=K2-18 b&type=CONFIRMED_PLANET.
↑Garner, Rob (2019-09-11). "Hubble Finds Water Vapor on Habitable-Zone Exoplanet for 1st Time". http://www.nasa.gov/feature/goddard/2019/nasa-s-hubble-finds-water-vapor-on-habitable-zone-exoplanet-for-1st-time.
↑Damasso, Mario et al. (2018). "Eyes on K2-3: A system of three likely sub-Neptunes characterized with HARPS-N and HARPS". Astronomy and Astrophysics615: A69. doi:10.1051/0004-6361/201732459. Bibcode: 2018A&A...615A..69D.
↑Kosiarek, Molly R. et al. (2019). "Bright Opportunities for Atmospheric Characterization of Small Planets: Masses and Radii of K2-3 b, c, and d and GJ3470 b from Radial Velocity Measurements and Spitzer Transits". The Astronomical Journal157 (3): 97. doi:10.3847/1538-3881/aaf79c. Bibcode: 2019AJ....157...97K.
↑Benneke, Björn et al. (2019). "Water Vapor and Clouds on the Habitable-zone Sub-Neptune Exoplanet K2-18b". The Astrophysical Journal887 (1): L14. doi:10.3847/2041-8213/ab59dc. Bibcode: 2019ApJ...887L..14B.
↑"Kepler Candidate Overview Page: KOI-1686.01". NASA Exoplanet Science Institute. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=KOI-1686.01.
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Original source: https://en.wikipedia.org/wiki/List of potentially habitable exoplanets. Read more