Action item 2: using the conversion: 1 pc = 206265 AU The star R Corona Australi

Question

Action item 2: using the conversion: 1 pc = 206265 AU The star R Corona Australia may pass as close as 0.54 pc to the Sun in about 300,000 years from now. Likewise, in about 1.5 million years from now the star Gliese 710 will pass as close 0.25 pc to the Sun. These are very close stellar shaves. Determine the AU distances to these two stars when they are at their closest approach to the Sun and clearly indicate the distances on the Regina-Star City reference line. Show all your calculations in the space below. Proxima Centauri (image center) is the closest star to the Sun. It was discovered in 1915 by astronomer Robert Innes working from the Union Observatory in Johannesburg in South Africa.

Explanation / Answer

The closest distance of star R Corona Australis is 0.54 pc

               1 pc = 206,265 AU

So 0.54 pc = 206265 x 0.54 = 111,383 AU.

The closest distance of R Corona Asutralis to Sun in 300,000 years is 111, 383 AU

Star Galiese closest distance to Sun is 0.25 pc

                              206265 x 0.25 = 51, 566

So, the Galiese closestdistance to sun in 1.5 million years is 51,566 AU

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