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Month: <span>March 2023</span>

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Part 1 – Units of Measurement in Astronomy (2 points) The distances in astronomy are so great that using miles or kilometers is insufficient, because the numbers become too large to handle. When dealing with the great distances within our solar system, we use Astronomical Units (AU), which are multiples of the distance from the Earth to the Sun. However, that measurement – the Astronomical Unit – is not large enough when considering the distance to other stars or galaxies. In that case, distance is stated in light years (ly), which is how far light travels in a year based on the speed of light. A third unit that is preferred by astronomers is the parsec (pc), which is even greater than a light year, and is based on the angle of parallax. __________________________________________________________________ A. The unit of measurement that is convenient for stating the large distances within our solar system is the Astronomical Unit (AU), defined as the average distance of the Earth to the Sun. That distance is approximately 150 million kilometers (150,000,000 km) or 93 million miles (93,000,000 miles). Some distances within the Solar System in AU are

Name:_______________________________                                                                   Date:______________________   ASTR 1303/1304 – Basics of Astronomy (Formulas & Math)   ASTRONOMICAL DISTANCES & LAWS OF MOTION (10 points)   Student…

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