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'''[[1 E+14 m|Distances shorter than 1 Pm]]''' |
'''[[1 E+14 m|Distances shorter than 1 Pm]]''' |
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* 1.0 Pm = 0.105702341 light years <ref>{{cite web |title=Google Conversion|url=https://www.google.com/?q=1+petameter+%3D+light+years#q=1+petameter+%3D+light+years}}</ref> |
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* 1.9 Pm ± .5 Pm = 12,000 AU = 0.2 light year radius of [[Cat's Eye Nebula]]'s inner core<ref name="Cat calc">radius = distance times sin(angular diameter/2) = 0.2 [[light year]]. Distance = 3.3 ± 0.9 [[light year|kly]]; angular diameter = 20 [[arcseconds]]{{Harv|Reed|Balick|Hajian|Klayton|1999}}</ref> |
* 1.9 Pm ± .5 Pm = 12,000 AU = 0.2 light year radius of [[Cat's Eye Nebula]]'s inner core<ref name="Cat calc">radius = distance times sin(angular diameter/2) = 0.2 [[light year]]. Distance = 3.3 ± 0.9 [[light year|kly]]; angular diameter = 20 [[arcseconds]]{{Harv|Reed|Balick|Hajian|Klayton|1999}}</ref> |
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* 4.7 Pm = 30,000 AU = half light year diameter of [[Bok globule]] [[Barnard 68]]<ref name="Szpir">{{cite web |author=Michael Szpir |title=Bart Bok's Black Blobs |url=http://www.americanscientist.org/template/AssetDetail/assetid/14678 |date=May–June 2001 |archiveurl=http://web.archive.org/web/20030629033609/http://www.americanscientist.org/template/AssetDetail/assetid/14678 |archivedate=2003-06-29 |publisher=[[American Scientist]] |quote=Bok globules such as Barnard 68 are only about half a light-year across and weigh in at about two solar masses |accessdate=2008-11-19}}</ref> |
* 4.7 Pm = 30,000 AU = half light year diameter of [[Bok globule]] [[Barnard 68]]<ref name="Szpir">{{cite web |author=Michael Szpir |title=Bart Bok's Black Blobs |url=http://www.americanscientist.org/template/AssetDetail/assetid/14678 |date=May–June 2001 |archiveurl=http://web.archive.org/web/20030629033609/http://www.americanscientist.org/template/AssetDetail/assetid/14678 |archivedate=2003-06-29 |publisher=[[American Scientist]] |quote=Bok globules such as Barnard 68 are only about half a light-year across and weigh in at about two solar masses |accessdate=2008-11-19}}</ref> |
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| last7 = Panagia | first7 = Nino |
| last7 = Panagia | first7 = Nino |
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| last8 = Terzian | first8 = Yervant |
| last8 = Terzian | first8 = Yervant |
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| title = Hubble |
| title = Hubble Spaaaaaace Telescope Measurements of the Expansion of NGC 6543: Parallax Distance and Nebular Evolution |
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| journal = Astronomical Journal | year = 1999 | volume = 118 | issue = 5 | pages = 2430–2441 |
| journal = Astronomical Journal | year = 1999 | volume = 118 | issue = 5 | pages = 2430–2441 |
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| bibcode = 1999AJ....118.2430R |
| bibcode = 1999AJ....118.2430R |
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Revision as of 01:07, 15 October 2014
Template:Orders of magnitude (length) imagemap astronomical-scale
To help compare different distances this page lists lengths starting at 1015 m (1 Pm or 1,000,000 million km or 6685 astronomical units (AU) or 0.11 light years).
- 1.0 Pm = 0.105702341 light years [1]
- 1.9 Pm ± .5 Pm = 12,000 AU = 0.2 light year radius of Cat's Eye Nebula's inner core[2]
- 4.7 Pm = 30,000 AU = half light year diameter of Bok globule Barnard 68[3]
- 7.5 Pm — 50,000 AU — Possible outer boundary of Oort cloud (other estimates are 75,000 to 125,000 or even 189,000 AU (1.6, 2, and 3 light years, respectively))
- 7.7 Pm — 52,000 AU — Aphelion distance of the Great Daylight Comet of 1910
- 9.5 Pm — 63,241.1 AU — One light year, the distance travelled by light in one year
Notes
- ^ "Google Conversion".
- ^ radius = distance times sin(angular diameter/2) = 0.2 light year. Distance = 3.3 ± 0.9 kly; angular diameter = 20 arcseconds(Reed et al. 1999)
- ^ Michael Szpir (May–June 2001). "Bart Bok's Black Blobs". American Scientist. Archived from the original on 2003-06-29. Retrieved 2008-11-19.
Bok globules such as Barnard 68 are only about half a light-year across and weigh in at about two solar masses
References
- Reed, Darren S.; Balick, Bruce; Hajian, Arsen R.; Klayton, Tracy L.; Giovanardi, Stefano; Casertano, Stefano; Panagia, Nino; Terzian, Yervant (1999). "Hubble Spaaaaaace Telescope Measurements of the Expansion of NGC 6543: Parallax Distance and Nebular Evolution". Astronomical Journal. 118 (5): 2430–2441. arXiv:astro-ph/9907313. Bibcode:1999AJ....118.2430R. doi:10.1086/301091.
{{cite journal}}: Invalid|ref=harv(help)