21. It is about one astronomical unit , or 93 million miles, or eight light minutes away. 22. The separation was later measured at 4.6 ", approximately 644 astronomical units ( AU ). 23. Gliese 422 b's semi-major axis is astronomical units and its orbital period is Earth days. 24. It has a separation of 12.6 arcseconds, and is around 350 astronomical units from the primary. 25. The orbital separation varies from 2 astronomical units at periastron to 17.5 astronomical units at apastron. 26. The inner edge of the stagnation region is located approximately 113 astronomical units from the Sun. 27. The orbital separation varies from 2 astronomical units at periastron to 17.5 astronomical units at apastron. 28. This system shows an K, corresponding to a separation from the star of 481 astronomical units . 29. At the estimated distance of Mu Leporis, this equals a projected distance of 52 Astronomical Units . 30. One astronomical unit , the distance between the Earth and the sun, equals about 92.7 million miles.
