| 11. | Both stars orbit each other at an average distance of 1, 200 astronomical units.
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| 12. | The two are 10.6 astronomical units apart and orbit each other every 21.78 years.
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| 13. | For example for distances in the Solar System the astronomical unit is most straightforward.
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| 14. | The two stars are separated by at least 515 astronomical units from each other.
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| 15. | The average orbital distance is 2.54 astronomical units or 380 gigameters or 12.3 microparsecs.
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| 16. | The system consists of a astronomical units ( AU ).
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| 17. | The pair may be separated by about 50 Astronomical Units.
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| 18. | The disk is orbiting the star at a minimum radius of 2.3 astronomical units.
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| 19. | The disk is located within an orbital radius of six Astronomical Units from the star.
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| 20. | An astronomical unit is the distance between the Earth and sun, about 93 million miles.
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