Hint use the results of the last problem you may need

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Unformatted text preview: ass of the part of the Milky Way within the Sun’s orbit in solar masses. HINT: Use the results of the last problem. You may need to do several unit conversions here, clearly state your reasoning for full credit. 6. [C&O 3.3 (tweaked)] The parallax angle for Sirius is 0.379". a. Find the distance to Sirius in units of (i) parsecs; (ii) light-years; (iii) AU. b. Estimate the flight time of the fastest spacecraft we have, New Horizons, to Sirius (if it was headed that way). It will take New Horizons 9 1/2 years to cover the distance between the Earth and Pluto (~32 AU). c. Determine the distance modulus for Sirius. Does the result make sense? NOTE: Problems 6 to 8 are variations of problems originally in Sparke and Gallagher’s Galaxies in the Universe (2nd Edition). 7. To determine a star’s trigonometric parallax, we actually need at least three (preferably more) measurements of its position relative to much more distant objects during the course of a year: why? HINT: What...
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