Lihat sumber TRAPPIST-1

{{Starbox begin
| name = TRAPPIST-1<ref name="OEC-TRAPPIST1b">{{cite web|url=http://www.openexoplanetcatalogue.com/planet/TRAPPIST-1b/|title=TRAPPIST-1b|publisher=Open Exoplanet Catalogue|access-date=2 May 2016|archive-date=2016-11-06|archive-url=https://web.archive.org/web/20161106043734/http://www.openexoplanetcatalogue.com/planet/TRAPPIST-1b/|dead-url=yes}}</ref>
}}
{{Starbox image
| image = [[Berkas:The ultracool dwarf star TRAPPIST-1 in the constellation of Aquarius.tif|250px]]
| caption = Lokasi TRAPPIST-1 di rasi bintang [[Akuarius]].
| credit = 
}}
{{Starbox observe
| epoch = 
| constell = [[Akuarius]]
| ra = {{RA|23|06|29.283}}<ref name="2MASS Cat">{{Cite journal|title=[[2MASS]] All Sky Catalog of point sources|last1=Cutri|first1=R. M.|last2=Skrutskie|first2=M. F.|last3=Van Dyk|first3=S.|last4=Beichman|first4=C. A.|last5=Carpenter|first5=J. M.|last6=Chester|first6=T.|last7=Cambresy|first7=L.|last8=Evans|first8=T.|last9=Fowler|first9=J.|last10=Gizis|first10=J.|last11=Howard|first11=E.|last12=Huchra|first12=J.|last13=Jarrett|first13=T.|last14=Kopan|first14=E. L.|last15=Kirkpatrick|first15=J. D.|last16=Light|first16=R. M.|last17=Marsh|first17=K. A.|last18=McCallon|first18=H.|last19=Schneider|first19=S.|last20=Stiening|first20=R.|last21=Sykes|first21=M.|last22=Weinberg|first22=M.|last23=Wheaton|first23=W. A.|last24=Wheelock|first24=S.|last25=Zacarias|first25=N.|publisher=[[European Southern Observatory]] with data provided by the [[Smithsonian Astrophysical Observatory|SAO]]/[[NASA]] [[Astrophysics Data System]]|journal=[[VizieR]] Online Data Catalog|volume=2246|date=June 2003|bibcode=2003yCat.2246....0C}}</ref>
| dec = {{DEC|–05|02|28.59}}<ref name="2MASS Cat"/>
| appmag_v = {{val|18.80}}
}}
{{Starbox character
| type 
| class = M8V<ref name="Solar neighborhood">{{Cite journal|title=The Solar Neighborhood. XVI. Parallaxes from CTIOPI: Final Results from the 1.5 m Telescope Program|url=http://iopscience.iop.org/article/10.1086/505706/pdf|format=PDF|last1=Costa|first1=E.|last2=Mendez|first2=R.A.|last3=Jao|first3=W.-C.|last4=Henry|first4=T.J.|last5=Subasavage|first5=J.P.|last6=Ianna|first6=P.A.|journal=[[The Astronomical Journal]]|volume=132|pages=1234|number=3|date=August 4, 2006|publisher=[[The American Astronomical Society]]|doi=10.1086/505706|bibcode=2006AJ....132.1234C}}</ref><br>M8.2V<ref group="note">berdasarkan estimasi jenis spektral fotometrik</ref>
| r-i = {{val|2.47}}
| v-r = {{val|2.33}}
| b-v = 
| u-b = 
| variable =
}}
{{Starbox astrometry
| radial_v = {{val|−56.3}}
| prop_mo_ra = 
| prop_mo_dec = 
| parallax = 82.58
| p_error = 
| parallax_footnote = 
| dist_ly = {{val|39.5|1.3}}
| dist_pc = {{val|12.1|0.4}}
| absmag_v = {{val|18.4|0.1}}
}}
{{Starbox detail
| metal = {{val|0.04|0.08}}
| mass = {{val|0.08|0.009}}
| mass_mj = {{val|83.8048|9.428}}
| radius = {{val|0.114|0.006}}
| temperature = {{val|2550|55|fmt=points}}
| luminosity_bolometric = {{val|0.000525|0.000036}}<ref name="Gillon2016">{{cite journal|title=Temperate Earth-sized planets transiting a nearby ultracool dwarf star |journal=[[Nature (journal)|Nature]] |volume=533 |issue=7602 |pages=221–224 |year=2016 | url= http://www.eso.org/public/archives/releases/sciencepapers/eso1615/eso1615a.pdf |doi=10.1038/nature17448 |last1=Gillon |first1=M. |last2=Jehin |first2=E. |last3=Lederer |first3=S. M. |last4=Delrez |first4=L. |last5=De Wit |first5=J. |last6=Burdanov |first6=A. |last7=Van Grootel |first7=V. |last8=Burgasser |first8=A. J. |last9=Triaud |first9=A. H. M. J. |last10=Opitom |first10=C. |last11=Demory |first11=B.-O. |last12=Sahu |first12=D. K. |last13=Bardalez Gagliuffi |first13=D. |last14=Magain |first14=P. |last15=Queloz |first15=D. |bibcode=2016Natur.533..221G }}</ref>
| luminosity_visual = {{val|0.00000373}}<ref name=luminosity_visual group=note/>
| gravity = ±{{val|5.227}}<ref group="note" name=universalgravity/><ref name="Viti'99">{{cite journal |last=Viti |first=Serena |last2=Jones, |first2=Hugh R. A. |date=November 1999 |title=Gravity dependence at the bottom of the main sequence |url=http://adsabs.harvard.edu/full/1999A%26A...351.1028V |journal=Astronomy and Astrophysics |publisher= |volume=351 |issue= |pages=1028–1035 |bibcode=1999A&A...351.1028V |access-date=6 May 2016}}</ref>
| rotation = {{val|1.40|0.05|u=hari}}
| rotational_velocity = {{val|6|2}}
| age_gyr = > 1
}}
{{Starbox catalog
| names = [[2MASS]] J23062928-0502285, <abbr title="2MASS, Incremental release point source catalog">2MASSI</abbr> J2306292-050227, <abbr title="2MASS, Working database">2MASSW</abbr> J2306292-050227, <abbr title="2MASS UltraCool Dwarves ">2MUDC</abbr> 12171
}}
{{Starbox reference
| Simbad = 2MASS+J23062928-0502285
| NSTED = 
| ARICNS = 
}}
{{Starbox end}}
'''TRAPPIST-1''', juga dikenal sebagai '''2MASS J23062928-0502285''',<ref>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=2MASS+J23062928-0502285|title=2MASS J23062928-0502285|publisher=}}</ref> adalah sebuah bintang [[katai merah]] [[katai ultradingin|ultradingin]]<ref name="Gillon2016" /><ref name="eso.org">{{Cite web |url=https://www.eso.org/public/news/eso1615/ |title=Three Potentially Habitable Worlds Found Around Nearby Ultracool Dwarf Star - Currently the best place to search for life beyond the Solar System |website=European Southern Observatory|language=en-GB |access-date=2016-05-02}}</ref> berjarak 39 tahun cahaya (12 parsec; 370 petameter) dari [[Bumi]] dalam rasi bintang [[Akuarius]].<ref name="NYT-20170222">{{cite news |last=Chang |first=Kenneth |title=7 Earth-Size Planets Identified in Orbit Around a Dwarf Star |url=https://www.nytimes.com/2017/02/22/science/trappist-1-exoplanets-nasa.html |date=22 February 2017 |work=[[New York Times]] |accessdate=22 February 2017 }}</ref>

Pada tahun 2015, tim astronom yang dipimpin oleh [[Michaël Gillon]] di [[Universitas Liège]], [[Belgia]] menggunakan [[fotometri transit]] bersama dengan ''Transiting Planets and Planetesimals Small Telescope'' ([[TRAPPIST]]) di [[Observatorium La Silla]] di Chili untuk menemukan tiga planet seukuran Bumi yang sedang mengorbit bintang katai.<ref name="eso.org"/><ref name="Guardian">{{cite web|url=https://www.theguardian.com/science/2016/may/02/could-these-newly-discovered-planets-orbiting-an-ultracool-dwarf-host-life|title=Could these newly-discovered planets orbiting an ultracool dwarf host life?|work=[[The Guardian]]|date=2 May 2016}}</ref><ref>{{Cite web|url= http://www.popularmechanics.com/space/deep-space/a20671/three-planets-life-outside-the-solar-system/ |title=Three New Planets Are the Best Bets for Life |work=[[Popular Mechanics]] |date=2 May 2016 |access-date=2 May 2016}}</ref> Tanggal 22 Februari 2017, para ahli astronomi mengumumkan empat [[eksoplanet]] tambahan sekitar TRAPPIST-1. Selain TRAPPIST, pekerjaan ini memanfaatkan antara lain [[Very Large Telescope]] di Paranal dan [[Teleskop luar angkasa Spitzer]] NASA, dan menemukan total jumlah planet menjadi tujuh, di mana tiga di antaranya dianggap berada dalam [[zona laik huni]].<ref name="SpaceRef">{{cite web |url=http://spaceref.com/astronomy/temperate-earth-sized-planets-found-in-extraordinarily-rich-planetary-system-trappist-1.html |title=Temperate Earth-Sized Planets Found in Extraordinarily Rich Planetary System TRAPPIST-1 |date=22 February 2017 |author= |publisher=SpaceRef |accessdate=11 February 2017 }}{{Pranala mati|date=Juli 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{Cite press release|url=https://exoplanets.nasa.gov/news/1419/nasa-telescope-reveals-largest-batch-of-earth-size-habitable-zone-planets-around-single-star/|title=NASA telescope reveals largest batch of Earth-size, habitable-zone planets around single star|newspaper=Exoplanet Exploration: Planets Beyond our Solar System|access-date=22 February 2017}}</ref> Yang lainnya juga mungkin dipercaya laik dihuni (memiliki air cair di suatu tempat di permukaannya).<ref name="SpaceRef"/><ref>{{Cite news|url= https://exoplanets.nasa.gov/news/1419/nasa-telescope-reveals-largest-batch-of-earth-size-habitable-zone-planets-around-single-star/|title= NASA telescope reveals largest batch of Earth-size, habitable-zone planets around single star |newspaper= Exoplanet Exploration: Planets Beyond our Solar System |access-date= 22 February 2017 |publisher= [[NASA]]}}</ref>

== Penemuan dan penamaan ==
Bintang di pusat sistem ditemukan tahun 1999 pada saat ''Two Micron All-Sky Survey'' ([[2MASS]]).<ref>{{cite web|url=http://www.udel.edu/udaily/2017/february/star-connection/ |title=Celestial Connection |last=Bryant |first=Tracey |date=22 February 2017|publisher=University of Delaware}}</ref> Hal tersebut masuk dalam katalog berikutnya dengan penamaan "2MASS J23062928-0502285". Angka-angkanya mengacu pada [[asensio rekta]] dan [[deklinasi]] dari posisi bintang di langit dan "J" mengacu pada [[Epoch (astronomi)#Tahun Julian dan J2000|Julian Epoch]].

Sistem ini kemudian dipelajari oleh sebuah tim di [[Universitas Liège]], yang membuat observasi awal mereka menggunakan ''Transiting Planets and Planetesimals Small Telescope–South'' dari bulan September hingga Desember 2015 dan mengumumkan temuan mereka dalam edisi Mei 2016 Jurnal ''[[Nature]]''.<ref name = "Gillon2016" /><ref name="Guardian" />[[Akronim]] teleskop robotik dari TRAPPIST menekankan bahwa proyek ini berasal dari Belgia, menunjukkan seperti halnya [[ordo keagamaan]] kontemplatif dari para [[Trapis]] (para astronom merayakan penemuan mereka dengan satu ronde [[bir Trapis]] kontemplatif,<ref>{{cite web|url=http://foreignpolicy.com/2017/02/22/new-terrestrial-planets-discovered-by-international-scientists-international-collaboration-maybe-theres-some-aliens/|title=News So Foreign It’s Out of This World: Scientists Discover Seven New Potentially Habitable Planets|last=Gramer|first=Robbie|date=22 February 2017|publisher=[[Foreign Policy]]}}</ref> yang mereka junjung tinggi).<ref>{{cite web | url = http://www.eso.org/public/news/eso1023/ | title = New National Telescope at La Silla—TRAPPIST to Scout the Sky and Uncover Exoplanets and Comets (eso1023 — Organisation Release) | date = 8 June 2010 | website = www.eso.org | publisher = ESO | accessdate = 4 January 2015}}</ref> Karena bintang yang dikitari eksoplanet pertama ditemukan dengan teleskop ini, maka para penemu menamakannya "TRAPPIST-1".

Planet dinamakan berdasarkan urutan penemuanya, dimulai dengan ''b'' untuk planet yang pertama ditemukan, ''c'' untuk yang kedua dan seterusnya.<ref name="planetnaming">{{cite arXiv |title=On the naming convention used for multiple star systems and extrasolar planets |date=2010 |last1=Hessman |first1=F. V. |last2=Dhillon |first2=V. S. |last3=Winget |first3=D. E. |last4=Schreiber |first4=M. R. |last5=Horne |first5=K. |last6=Marsh |first6=T. R. |last7=Guenther |first7=E. |last8=Schwope |first8=A. |last9=Heber |first9=U. |eprint=1012.0707|class=astro-ph.SR }}</ref> Tiga planet di sekitar TRAPPIST-1 yang pertama ditemukan dan diberi nama ''b'', ''c'', dan ''d'' berdasarkan kenaikan [[periode orbit]],<ref name="Gillon2016" /> dan kelompok kedua penemuan dengan cara yang sama diberi nama ''e'' sampai ''h''.

== Karakteristik bintang ==
TRAPPIST-1 merupakan sebuah bintang [[katai ultradingin]], dengan kelas spektral M8,0 ± 0,5, yang kira-kira 8% massa dan 11% radius dari [[Matahari]]. Temperaturnya 2550 [[skala Kelvin|K]] dan sedikitnya berusia 500 juta tahun.<ref name="Gillon2016" /> Sebagai perbandingan, [[Matahari]] berusia sekitar 4,6 miliar tahun<ref>{{cite web |url=http://www.universetoday.com/18847/life-of-the-sun/ |title=What is the Life Cycle Of The Sun?|author=Williams, Matt |date=24 September 2016 |work= |publisher=Universe Today |accessdate=19 February 2011}}</ref> dan memiliki temperatur 5778 K.<ref>{{cite web |url=http://www.universetoday.com/18092/temperature-of-the-sun/ |title=Temperature of the Sun |author=Cain, Fraser |date=23 December 2015  |work= |publisher=Universe Today |accessdate=19 February 2011}}</ref>

== Sistem keplanetan ==
Pada Februari 2017 para ahli astronomi mengumumkan penemuan [[sistem keplanetan]] dari bintang ini yang tersusun atas tujuh planet mirip Bumi (''[[TRAPPIST-1e|e]]'', ''[[TRAPPIST-1f|f]]'', ''[[TRAPPIST-1g|g]]'') tiga di antaranya mengorbit dalam zona laik huni.<ref name="nasa.gov">{{Cite press release |title=NASA Telescope Reveals Largest Batch of Earth-Size, Habitable-Zone Planets Around Single Star |publisher=[[NASA]] |url=https://www.nasa.gov/press-release/nasa-telescope-reveals-largest-batch-of-earth-size-habitable-zone-planets-around}}</ref><ref name="JPL image">{{Cite web |url=http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA21422 |title=TRAPPIST-1 Planet Lineup |website=jpl.nasa.gov}}</ref>
{{OrbitboxPlanet begin
| name = TRAPPIST-1
| table_ref = <ref name="Gillon2017">{{cite journal|title=Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1 |journal=[[Nature (journal)|Nature]] |volume=542 |issue= |pages=456–460 |year=2017 | url= |doi=10.1038/nature21360 |last1=Gillon |first1=Michaël |last2=Triaud |first2=Amaury H. M. J. |last3=Demory |first3=Brice-Olivier |last4=Jehin |first4=Emmanuël |last5=Agol |first5=Eric |last6=Deck |first6=Katherine M. |last7=Lederer |first7=Susan M. |last8=Wit |first8=Julien de |last9=Burdanov |first9=Artem |last10=Ingalls |first10=James G. |last11=Bolmont |first11=Emeline |last12=Leconte |first12=Jeremy |last13=Raymond |first13=Sean N. |last14=Selsis |first14=Franck |last15=Turbet |first15=Martin |last16=Barkaoui |first16=Khalid |last17=Burgasser |first17=Adam |last18=Burleigh |first18=Matthew R. |last19=Carey |first19=Sean J. |last20=Chaushev |first20=Aleksander |last21=Copperwheat |first21=Chris M. |last22=Delrez |first22=Laetitia |last23=Fernandes |first23=Catarina S. |last24=Holdsworth |first24=Daniel L. |last25=Kotze |first25=Enrico J. |last26=Grootel |first26=Valérie Van |last27=Almleaky |first27=Yaseen |last28=Benkhaldoun |first28=Zouhair |last29=Magain |first29=Pierre |last30=Queloz |first30=Didier }}</ref><ref name = "Gillon2018">{{cite journal|url=http://www.eso.org/public/archives/releases/sciencepapers/eso1706/eso1706a.pdf |title=Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1|journal= Nature|volume= 542|issue= 7642|pages= 456|doi= 10.1038/nature21360|year= 2017|last1= Gillon|first1=M.|last2= Triaud|first2=A. H. M. J.|last3= Demory|first3=B.-O.|last4= Jehin|first4= E.|last5= Agol|first5=E.|last6= Deck|first6=K. M.|last7= Lederer|first7=S. M.|last8=De Wit|first8=J.|last9= Burdanov|first9=A.|last10= Ingalls|first10=J. G.|last11= Bolmont|first11=E.|last12= Leconte|first12=J.|last13= Raymond|first13=S. N.|last14= Selsis|first14=F.|last15= Turbet|first15=M.|last16= Barkaoui|first16=K.|last17= Burgasser|first17=A.|last18= Burleigh|first18=M. R.|last19= Carey|first19=S. J.|last20= Chaushev|first20=A.|last21= Copperwheat|first21=C. M.|last22= Delrez|first22=L.|last23= Fernandes|first23=C. S.|last24= Holdsworth|first24=D. L.|last25= Kotze|first25=E. J.|last26= Van Grootel|first26=V.|last27= Almleaky|first27=Y.|last28= Benkhaldoun|first28=Z.|last29= Magain|first29=P.|last30= Queloz|first30=D.}}</ref>
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1b|b]]
| mass_earth = {{val|0.85|0.72}}
| period = {{val|1.51087081|0.00000060}}
| semimajor = {{val|0.01111}}
| eccentricity = < {{val|0.081}}
| inclination =   {{val|89.65|0.25}}
| radius_earth = {{val|1.086|0.035}}
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1c|c]]
| mass_earth = {{val|1.38|0.61}}
| period = {{val|2.4218233|0.0000017}}
| semimajor = {{val|0.01522}}
| eccentricity = < {{val|0.083}}
| inclination = {{val|89.67|0.17}}
| radius_earth = {{val|1.056|0.035}}
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1d|d]]
| mass_earth = {{val|0.41|0.27}}
| period = {{val|4.049610|0.000063}}
| semimajor = {{val|0.021|0.006}}
| eccentricity = < {{val|0.070}}
| inclination = {{val|89.75|0.16}}
| radius_earth = {{val|0.772|0.030}}
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1e|e]]
| mass_earth = {{val|0.62|0.58}}
| period = {{val|6.099615|0.000011}}
| semimajor = {{val|0.028}}
| eccentricity = < {{val|0.085}}
| inclination = {{val|89.86|0.11}}
| radius_earth = {{val|0.918|0.039}}
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1f|f]]
| mass_earth = {{val|0.68|0.18}}
| period = {{val|9.206690|0.000015}}
| semimajor = {{val|0.037}}
| eccentricity = < {{val|0.063}}
| inclination = {{val|89.680|0.034}}
| radius_earth = {{val|1.045|0.038}}
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1g|g]]
| mass_earth = {{val|1.34|0.88}}
| period = {{val|12.35294|0.00012}}
| semimajor = {{val|0.045}}
| eccentricity = < {{val|0.061}}
| inclination = {{val|89.710|0.025}}
| radius_earth = {{val|1.127|0.041}}
}}
{{OrbitboxPlanet
| exoplanet= [[TRAPPIST-1h|h]]
| mass_earth   = {{val|0.331|0.056|-0.049}}
| period       = {{val|18.767953|0.000080}}
| semimajor    = {{val|0.06193488}} ({{convert|0.06193488|AU|e6km|2|disp=out|abbr=unit}})
| eccentricity = {{val|0.00567|0.00121}}
| inclination  = {{val|89.796|0.023}}
| radius_earth = {{val|0.773|0.026|-0.027}}

}}
{{Orbitbox end}}
Ketujuh planet yang mengitari TRAPPIST-1 memiliki jarak orbit yang jauh lebih kecil dari jarak Merkurius dari Matahari. Jarak antara orbit dari TRAPPIST 1-b dengan TRAPPIST 1c sama dengan 1,6 kali jarak Bumi ke Bulan. Masing-masing planet mungkin akan terlihat lebih menonjol dari planet lainnya, dan akan lebih besar dari penampakan Bulan dari Bumi.<ref>{{cite web|url=http://www.theverge.com/2017/2/22/14674088/7-planet-solar-system-discovered-conditions-for-life-water-nature-nasa|title=This solar system of seven Earth-sized planets may be the best place to look for alien life|first=Loren|last=Grush|date=22 February 2017|publisher=}}</ref><ref>{{Cite news |url=https://exoplanets.nasa.gov/trappist1/ |title=Largest batch of Earth-size, habitable zone planets |newspaper=Exoplanets Exploration |publisher=[[Nasa]]}}</ref>{{Failed verification|date=February 2017|reason=neither source mentions "orders", exoplanets.nasa.gov has "as visible as our moon is from Earth" which is consistent, while theverge is also possibly misquoting as its maths is inconsistent with radii of Moon and exoplanets}} Satu tahun di planet terdekatnya hanya berlangsung satu setengah hari di bumi, dan jika satu tahun di planet keenamnya berlangsung 12,3 hari di bumi.

== Galeri ==
<gallery mode="packed" heights="150px">
Berkas:PIA22094-TRAPPIST-1-PlanetLineup-20180205.jpg|Ssc2017-01f Sm|jmpl|upright=1.5|Konsep artis gambaran sistem keplanetan TRAPPIST-1 yang mungkin terlihat, berdasarkan data yang tersedia mengenai diameter, massa, dan jarak mereka dari bintang induk
Berkas:Artist’s impression of the TRAPPIST-1 planetary system.jpg|Impresi artis gambaran sistem keplanetan dari bintang TRAPPIST-1<ref>{{cite web|title=Ultracool Dwarf and the Seven Planets - Temperate Earth-sized Worlds Found in Extraordinarily Rich Planetary System|url=https://www.eso.org/public/news/eso1706/|website=www.eso.org|accessdate=22 February 2017}}</ref>
Berkas:Artist's view of planets transiting red dwarf star in TRAPPIST-1 system.jpg|Impresi artis gambaran pergerakan planet terhadap bintang katai merah di dalam sisem TRAPPIST-1<ref>{{cite web|title=Artist's view of planets transiting red dwarf star in TRAPPIST-1 system|url=http://www.spacetelescope.org/images/opo1627a/|website=www.spacetelescope.org|accessdate=21 July 2016}}</ref>
Berkas:Comparison between the Sun and the ultracool dwarf star TRAPPIST-1.jpg|Impresi artis skala perbandingan antara Matahari dan TRAPPIST-1, bintang ini hanya memiliki 11% dari diameter Matahari dan memiliki warna yang lebih kemerahan.
Berkas:TRAPPIST-1 and its three planets.jpg|Gambaran TRAPPIST-1 dan tiga planetnya.
Berkas:Artist’s impression of the ultracool dwarf star TRAPPIST-1 from the surface of one of its planets.jpg|Impresi artis gambaran pemandangan dari TRAPPIST-1c
Berkas:Artist’s impression of the ultracool dwarf star TRAPPIST-1 from close to one of its planets.ogv|Impresi artis video gambaran satu planet dengan tiga planet lainnya yang saling berdekatan
Berkas:PIA21422 - TRAPPIST-1 Planet Lineup, Figure 1.jpg|NASA-JPL/Caltech: Gambaran sistem keplanetan dari TRAPPIST-1, yang kurang lebih sama
Berkas:PIA21428 - TRAPPIST-1 Comparison to Solar System and Jovian Moons.jpg|Ssc2017-01g Sm|Perbandingan dengan sistem tata surya kita; Ketujuh planet dari TRAPPIST-1 yang memiliki orbit lebih kecil dari orbit Merkurius terhadap Matahari
Berkas:A trip to TRAPPIST-1 and its seven planets.webm|Video ini menggambarkan perjalanan dari Bumi ke Bulan dan menuju ke TRAPPIST-1.
Berkas:PIA21425 - TRAPPIST-1 Statistics Table.jpg|Atas: ilustrasi artis tentang 7 planet sistem TRAPPIST-1 (angka menunjukkan periode orbit, jarak dari bintang, jari-jari dan massa, dibandingkan dengan Bumi).<br/>Bawah: planet-planet kebumian di Tata Surya, dengan skala yang sama.
</gallery>

== Catatan ==
{{reflist|group=note|refs=

{{#tag:ref|Dengan mengambil magnitudo visual absolut TRAPPIST-1 <math>\scriptstyle M_{V_{\ast}}=18.4</math> dan magnitudo visual absolut Matahari <math style="vertical-align:-33%;">\scriptstyle M_{V_{\odot}}=4.83</math>, luminositas visual dapat dihitung dengan <math>\scriptstyle \frac{L_{V_{\ast}}}{L_{V_{\odot}}}=10^{0.4\left(M_{V_{\odot}} - M_{V_{\ast}}\right)}</math>|group="note"|name=luminosity_visual}}

<ref group="note" name=universalgravity>Gravitasi permukaan dihitung langsung dari [[Hukum gravitasi universal Newton]], dengan rumus <math>\scriptstyle g = {\frac{GM}{r^2}}</math> di mana ''M'' adalah massa objek, ''r'' adalah radiusnya, dan ''G'' adalah [[konstanta gravitasi]].</ref>
}}

== Referensi ==
{{reflist}}

== Bacaan lanjutan ==
* {{cite web|author=Thomas Levenson|work=[[The Atlantic]]|url=http://www.theatlantic.com/science/archive/2016/05/astronomers-have-found-planets-in-the-habitable-zone/480690/|title=Astronomers Have Found Planets in the Habitable Zone of a Nearby Star|date=May 2, 2016|accessdate=July 31, 2016}}

== Pranala luar ==
* [https://www.youtube.com/watch?v=HraVXnHyRHI NASA Discovers 7 Planets Orbiting TRAPPIST 1]
* [http://www.trappist.one/ TRAPPIST-1], Planetary system website.
* [http://www.eso.org/public/usa/videos/eso1615a/ ESOcast 83: Ultracool dwarf star with planets (video)] {{Webarchive|url=https://web.archive.org/web/20160611031307/http://www.eso.org/public/usa/videos/eso1615a/ |date=2016-06-11 }}
* [https://www.youtube.com/watch?v=ieJIht3fnVM NASA Briefing on the Discovery of TRAPPIST-1's 7 Planets]

{{TRAPPIST-1}}

[[Kategori:Objek 2MASS]]
[[Kategori:Rasi bintang Aquarius]]
[[Kategori:Sistem keplanetan]]
[[Kategori:Sistem TRAPPIST-1| ]]