ผลต่างระหว่างรุ่นของ "หน่วยดาราศาสตร์"
เนื้อหาที่ลบ เนื้อหาที่เพิ่ม
บรรทัด 16:
| align=left | [[โลก]]
| align=right| 0.0003
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| align=left | เส้นรอบวงของโลก ณ [[เส้นศูนย์สูตร]] (ราว {{Convert|40075|km|comma=gaps|disp=or|abbr=on}})
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|- style="background-color: #e2e2e2"
| align=left | วินาทีแสง
| align=right| 0.002<!--figure space --> 
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| align=left | ระยะทางที่แสงเดินทางในเวลา 1 วินาที
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| align=left | [[ดวงจันทร์]]
บรรทัด 30:
| –
| align=left | ระยะทางเฉลี่ยจากโลก
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|- style="background-color: #e2e2e2"
| align=left | [[รัศมีดวงอาทิตย์]]
| align=right| 0.005<!--figure space --> 
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| align=left | radius of the [[Sun]] ({{val|695500|u=km}}, {{val|432450|u=mi}}, ~110 times the radius of the Earth or 10 times the average radius of Jupiter)
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| align=left | [[Lagrangian point]]
| align=right| 0.01<!--figure space -->  
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| align=left | The Lagrangian point L2 is about {{convert|1500000|km|mi|abbr=on|comma=gaps}} from Earth. Unmanned [[space missions]], such as the [[James Webb Space Telescope]], [[Planck (spacecraft)|Planck]] and [[Gaia (spacecraft)|Gaia]] take advantage of this sun-shielded location.
| <ref>http://www.esa.int [http://www.esa.int/Our_Activities/Operations/What_are_Lagrange_points What are Lagrange points], 21 June 2013</ref>
บรรทัด 46:
| align=left | นาทีแสง
| align=right| 0.12<!--figure space -->  
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| align=left | ระยะทางที่แสงเดินทางในเวลา 1 นาที
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| align=left | [[ดาวพุธ]]
บรรทัด 54:
| –
| align=left | average distance from the Sun
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| align=left | [[ดาวศุกร์]]
บรรทัด 60:
| –
| align=left | average distance from the Sun
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| align=left | [[โลก]]
บรรทัด 66:
| –
| align=left | average distance of the [[Earth's orbit]] from the Sun ([[Sunlight]] travels for 8 minutes and 19 seconds before reaching the Earth.)
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| align=left | [[ดาวอังคาร]]
บรรทัด 72:
| –
| align=left | average distance from the Sun
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| align=left | [[ดาวซีรีส]]
บรรทัด 78:
| –
| align=left | average distance from the Sun. The only [[dwarf planet]] in the [[asteroid belt]].
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| align=left | [[ดาวพฤหัสบดี]]
บรรทัด 84:
| –
| align=left | average distance from the Sun
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|-
| align=left | [[ดาวบีเทลจุส]]
| align=right| 5.5<!--figure space -->   
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| align=left | star's mean diameter (It is a [[red supergiant]] with about {{val|1000}} [[solar radii]].)
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|- style="background-color: #e2e2e2"
| align=left | ชั่วโมงแสง
| align=right| 7.2<!--figure space -->   
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| align=left | ระยะทางที่แสงเดินทางในเวลา 1 ชั่วโมง
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| align=left | [[NML Cygni]]
| align=right| 7.67<!--figure space -->  
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| align=left | radius of one of the [[List of largest known stars|largest known star]]s
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| align=left | [[ดาวเสาร์]]
บรรทัด 108:
| –
| align=left | average distance from the Sun
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|-
| align=left | [[ดาวยูเรนัส]] (ดาวมฤตยู)
บรรทัด 114:
| –
| align=left | average distance from the Sun
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| align=left | [[ดาวเนปจูน]] (ดาวสมุทร/ดาวเกตุ)
บรรทัด 120:
| –
| align=left | average distance from the Sun
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|-
| align=left | [[Kuiper belt]]
| align=right| 30<!--figure space -->     
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| align=left | begins at roughly that distance from the Sun
| <ref>{{Citation |url=http://www.iop.org/EJ/article/0004-637X/490/2/879/36659.html |author=Alan Stern |title=Collisional Erosion in the Primordial Edgeworth-Kuiper Belt and the Generation of the 30–50 AU Kuiper Gap |journal=The [[Astrophysical Journal]] |volume=490 |issue=2 |pages=879–882 |date=1997 |doi=10.1086/304912 |last2=Colwell |first2=Joshua E. |bibcode=1997ApJ...490..879S |postscript=.}}</ref>
บรรทัด 130:
| align=left | ''[[New Horizons]]''
| align=right| 32.92<!--figure space -->  
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| align=left | spacecraft's distance from the Sun, {{as of|2015|7|16|lc=y}}
| <ref>{{As of|2015|7|16}} [http://pluto.jhuapl.edu/Mission/Where-is-New-Horizons/index.php]</ref>
บรรทัด 138:
| –
| align=left | average distance from the Sun (It varies by 9.6 AU due to the dwarf planet's [[elliptic orbit]].)
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| align=left | [[Scattered disc]]
| align=right| 45<!--figure space -->     
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| align=left | roughly begins at that distance from the Sun (it overlaps with the Kuiper belt.)
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| align=left | [[Kuiper belt]]
บรรทัด 150:
| ± 3
| align=left | ends at that distance from the Sun
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|-
| align=left | [[Eris (dwarf planet)|Eris]]
| align=right| 67.8<!--figure space -->   
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| align=left | its [[semi-major axis]]
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| align=left | [[90377 เซดนา]]
| align=right| 76<!--figure space -->     
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| align=left | closest distance from the Sun ([[perihelion]])
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| align=left | [[90377 เซดนา]]
| align=right| 87<!--figure space -->     
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| align=left | distance from the Sun {{As of|2012|lc=y}} (It is an object of the [[scattered disc]] and takes {{val|11400}} years to orbit the Sun.)
| <ref name="AstDys-Sedna">{{citation |title=AstDys (90377) Sedna Ephemerides |publisher=Department of Mathematics, University of Pisa, Italy |url=http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.3.0&n=Sedna |accessdate=5 May 2011}}</ref>
บรรทัด 172:
| align=left | [[Heliosphere#Termination shock|Termination shock]]
| align=right| 94<!--figure space -->     
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| align=left | distance from the Sun of boundary between [[solar wind]]s/[[stellar wind|interstellar winds]]/[[interstellar medium]]
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| align=left | [[Eris (dwarf planet)|Eris]]
| align=right| 96.4<!--figure space -->   
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| align=left | distance from the Sun {{As of|2014|lc=y}} (Eris and its moon are currently the most distant known objects in the Solar System apart from [[long-period comet]]s and [[space probe]]s, and roughly three times as far as Pluto.)
| <ref>{{Citation |title=Spacecraft escaping the Solar System |publisher=Heavens-Above |author=Chris Peat |url=http://www.heavens-above.com/solar-escape.asp |accessdate=25 January 2008}}</ref>
บรรทัด 184:
| align=left | [[Heliosheath]]
| align=right| 100<!--figure space -->     
|
| align=left | the region of the [[heliosphere]] beyond the termination shock, where the solar wind is slowed down, more turbulent and compressed due to the interstellar medium
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|-
| align=left | ''[[Voyager 1]]''
| align=right| 125<!--figure space -->     
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| align=left | {{As of|2013|08}}, the [[space probe]] is the furthest human-made object from the Sun. It is traveling at about 3.5 astronomical units per year.
| <ref>[http://voyager.jpl.nasa.gov/where/index.html Voyager 1], Where are the Voyagers – NASA Voyager 1</ref>
บรรทัด 196:
| align=left | [[Light-day]]
| align=right| 173<!--figure space -->     
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| align=left | distance light travels in one day
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| align=left | [[90377 Sedna]]
| align=right| 942<!--figure space -->     
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| align=left | farthest distance from the Sun ([[aphelion]])
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|-
| align=left | [[Hills cloud]]
บรรทัด 210:
| ± {{val|1000}}
| align=left | beginning of Hills cloud (It is the inner part of the Oort cloud and shaped like a disc or doughnut.)
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|-
| align=left | [[Hills cloud]]
| align=right| {{val|20000}}<!--figure space -->     
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| align=left | end of the inner Oort cloud, beginning of outer Oort cloud, which is weakly bound to the Sun and believed to have a spherical shape
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|- style="background-color: #e2e2e2"
| align=left | [[ปีแสง]]
| align=right| {{val|63241}}<!--figure space -->     
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| align=left | ระยะทางที่แสงเดินทางในเวลา 1 ปี (365.25 วัน)
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|-
| align=left | [[Oort cloud]]
บรรทัด 228:
| ± {{val|25000}}
| align=left | distance of the outer limit of Oort cloud from the Sun (estimated, corresponds to 1.2 light-years)
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|- style="background-color: #e2e2e2"
| align=left | [[Parsec]]
| align=right| {{val|206265}}<!--figure space -->     
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| align=left | one [[parsec]] (The parsec is defined in terms of the astronomical unit, is used to measure distances beyond the scope of the Solar System and is about 3.26 light-years.)
| <ref>http://www.iau.org, [http://www.iau.org/public/themes/measuring/ Measuring the Universe–The IAU and astronomical units]</ref>
บรรทัด 238:
| align=left | [[Hill sphere|Hill/Roche sphere]]
| align=right| {{val|230000}}<!--figure space -->     
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| align=left | maximum extent of the Sun's [[gravitational field]], beyond this is true [[interstellar medium]] (~3.6 light-years)
| <ref name=Chebotarev1964>{{Citation |last=Chebotarev |first=G.A. |title=Gravitational Spheres of the Major Planets, Moon and Sun |journal=Soviet Astronomy |volume=7 |issue=5 |pages=618–622 |date=1964 |bibcode=1964SvA.....7..618C}}</ref>
บรรทัด 246:
| ± 126
| align=left | distance to the nearest star to our Solar System
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|-
| align=left | [[ดาวซิริอุส]] (ดาวโจร)
| align=right| {{val|544000}}<!--figure space -->     
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| align=left | distance to the brightest star seen in the Earth's night sky (~8.6 light-years)
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|-
| align=left | [[ดาวบีเทลจุส]]
| align=right| {{val|40663000}}<!--figure space -->     
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| align=left | distance to the star in the constellation of [[Orion (constellation)|Orion]] (~643 light-years)
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|-
| align=left | [[Galactic Centre]]
| align=right| {{val|1700000000}}<!--figure space -->     
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| align=left | distance from the Sun to the center of the [[Milky Way]]
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|-
! colspan=5 style="font-weight: normal; font-size: 0.9em; text-align: left; padding: 6px 2px 4px 4px" | Note: figures in this table are generally rounded, estimates, often rough estimates, and may considerably differ from other sources. Table also includes other units of length for comparison.
บรรทัด 272:
* [[ปีแสง]]
* [[พาร์เซก]]
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