Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Astronomy

Earth's seven sisters

Seven small planets whose surfaces could harbour liquid water have been spotted around a nearby dwarf star. If such a configuration is common in planetary systems, our Galaxy could be teeming with Earth-like planets. See Letter p.456

This is a preview of subscription content, access via your institution

Access options

Buy article

Get time limited or full article access on ReadCube.

$32.00

All prices are NET prices.

Figure 1: The TRAPPIST-1 planetary system.

Notes

  1. See Futures pg 512

  2. See all news & views

References

  1. Kumar, S. S. Astrophys. J. 137, 1121–1125 (1963).

    Article  ADS  Google Scholar 

  2. Gillon, M. et al. Nature 533, 221–224 (2016).

    Article  ADS  CAS  Google Scholar 

  3. Gillon, M. et al. Nature 542, 456–460 (2017).

    Article  ADS  CAS  Google Scholar 

  4. Goldreich, P. & Tremaine, S. Astrophys. J. 241, 425–441 (1980).

    Article  ADS  MathSciNet  Google Scholar 

  5. Berta, Z. K., Irwin, J. & Charbonneau, D. Astrophys. J. 775, 91 (2013).

    Article  ADS  Google Scholar 

  6. Dressing, C. D. & Charbonneau, D. Astrophys. J. 807, 45 (2015).

    Article  ADS  Google Scholar 

  7. Sullivan, P. W. et al. Astrophys. J. 809, 77 (2015).

    Article  ADS  Google Scholar 

  8. de Wit, J. et al. Nature 537, 69–72 (2016).

    Article  ADS  CAS  Google Scholar 

  9. Leconte, J. et al. Astron. Astrophys. 554, A69 (2013).

    Article  Google Scholar 

  10. Laughlin, G., Bodenheimer, P. & Adams, F. C. Astrophys J. 482, 420–432 (1997).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ignas A. G. Snellen.

Additional information

See Futures p.512

Related links

Related links

Related links in Nature Research

Astronomy: Earth-like planet around Sun's neighbour

Astronomy: A small star with an Earth-like planet

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Snellen, I. Earth's seven sisters. Nature 542, 421–422 (2017). https://doi.org/10.1038/542421a

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/542421a

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing