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Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1

Overview of attention for article published in Nature, February 2017
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • Among the highest-scoring outputs from this source (#19 of 47,304)
  • High Attention Score compared to outputs of the same age (99th percentile)
  • High Attention Score compared to outputs of the same age and source (99th percentile)

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290 Mendeley
2 CiteULike
Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
Published in
Nature, February 2017
DOI 10.1038/nature21360
Pubmed ID

Gillon, Michaël, Triaud, Amaury H. M. J., Demory, Brice-Olivier, Jehin, Emmanuël, Agol, Eric, Deck, Katherine M., Lederer, Susan M., de Wit, Julien, Burdanov, Artem, Ingalls, James G., Bolmont, Emeline, Leconte, Jeremy, Raymond, Sean N., Selsis, Franck, Turbet, Martin, Barkaoui, Khalid, Burgasser, Adam, Burleigh, Matthew R., Carey, Sean J., Chaushev, Aleksander, Copperwheat, Chris M., Delrez, Laetitia, Fernandes, Catarina S., Holdsworth, Daniel L., Kotze, Enrico J., Van Grootel, Valérie, Almleaky, Yaseen, Benkhaldoun, Zouhair, Magain, Pierre, Queloz, Didier, Michaël Gillon, Amaury H. M. J. Triaud, Brice-Olivier Demory, Emmanuël Jehin, Eric Agol, Katherine M. Deck, Susan M. Lederer, Julien de Wit, Artem Burdanov, James G. Ingalls, Emeline Bolmont, Jeremy Leconte, Sean N. Raymond, Franck Selsis, Martin Turbet, Khalid Barkaoui, Adam Burgasser, Matthew R. Burleigh, Sean J. Carey, Aleksander Chaushev, Chris M. Copperwheat, Laetitia Delrez, Catarina S. Fernandes, Daniel L. Holdsworth, Enrico J. Kotze, Valérie Van Grootel, Yaseen Almleaky, Zouhair Benkhaldoun, Pierre Magain, Didier Queloz, Micha?l Gillon, Emmanu?l Jehin, Val?rie Van Grootel, Triaud, Amaury, Jehin, Emmanuel, Deck, Katherine, Lederer, Susan, Ingalls, James, Raymond, Sean, Burleigh, Matthew, Carey, Sean, Copperwheat, Chris, Fernandes, Catarina, Holdsworth, Daniel, Kotze, Enrico, Michael Gillon, Emmanuel Jehin, Valerie Van Grootel


One aim of modern astronomy is to detect temperate, Earth-like exoplanets that are well suited for atmospheric characterization. Recently, three Earth-sized planets were detected that transit (that is, pass in front of) a star with a mass just eight per cent that of the Sun, located 12 parsecs away. The transiting configuration of these planets, combined with the Jupiter-like size of their host star-named TRAPPIST-1-makes possible in-depth studies of their atmospheric properties with present-day and future astronomical facilities. Here we report the results of a photometric monitoring campaign of that star from the ground and space. Our observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1. The six inner planets form a near-resonant chain, such that their orbital periods (1.51, 2.42, 4.04, 6.06, 9.1 and 12.35 days) are near-ratios of small integers. This architecture suggests that the planets formed farther from the star and migrated inwards. Moreover, the seven planets have equilibrium temperatures low enough to make possible the presence of liquid water on their surfaces.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 290 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 7 2%
Germany 3 1%
Spain 3 1%
France 2 <1%
Mexico 2 <1%
Brazil 2 <1%
Canada 2 <1%
Switzerland 2 <1%
Japan 2 <1%
Other 9 3%
Unknown 256 88%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 90 31%
Student > Bachelor 46 16%
Researcher 45 16%
Student > Master 36 12%
Student > Postgraduate 15 5%
Other 58 20%
Readers by discipline Count As %
Physics and Astronomy 154 53%
Agricultural and Biological Sciences 27 9%
Earth and Planetary Sciences 25 9%
Chemistry 15 5%
Biochemistry, Genetics and Molecular Biology 11 4%
Other 58 20%

Attention Score in Context

This research output has an Altmetric Attention Score of 3619. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 19 July 2017.
All research outputs
of 8,085,102 outputs
Outputs from Nature
of 47,304 outputs
Outputs of similar age
of 236,324 outputs
Outputs of similar age from Nature
of 897 outputs
Altmetric has tracked 8,085,102 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 47,304 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 73.7. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 236,324 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 897 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 99% of its contemporaries.