Pre Lab 1 – 2024 – Solar System Scaling (1)

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Solano Community College *

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010

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Astronomy

Date

Apr 3, 2024

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docx

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3

Uploaded by DeanDanger13814

Astronomy 020 —Pre Lab 1 Scaling of the Solar System Pre–lab Questions 1. Round the following numbers to three significant digits and convert them to scientific notation: a. 160 = b. 1009 = c. 1,100,912 = d. 1,040,306,000,716,000 = e. 0.017309 = f. 0.00010145 = g. 123,699 = h. 0.0000000045682 = 2. One mile is equal to 1.609 kilometers ( km ) and the average Earth-Sun distance is 93,000,000 miles Note that this distance (in any units) is defined to be one Astronomical Unit (1 A.U.). Note that 1 km = 1000 m and 1 m = 100 cm . a. What is the distance to the Sun in km ? Round off your answer to two significant digits. Show your work. b. How many centimeters ( cm) are in one A.U.? Round off your answer to two significant digits. Show your work.
c. Imagine that you have just discovered Planet X, orbiting the Sun at a distance of 8,500,000,000 kilometers — eight and a half billion kilometers . How many A.U.'s from the Sun is Planet X? Round off your answer to two significant digits. Show your work. 3. One light-year is equal to the distance that light travels in one year. Since light travels at a speed of 300,000 km/s, this is no small distance! Considering that there are 60 seconds per minute, 60 minutes per hour, 24 hours in a day, and 365.25 days in a year, what is the distance to the star known as Barnard’s Star, located 5.96 light-years distant? Round off your answer to three significant digits. Show your work Solano College Page 2 Astronomy
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