The spiral galaxy is about 2x 10^9 km away from us. In light years, this distance is
Answers
Answer:Figure it out
Step-by-step explanation: distance = (1.86 x 105 miles/second) x (3.16 x 107 seconds) = 5.88 x 1012 miles = 5.88 Trillion miles Now, to find out how many meters this is we need only do some unit conversions. From page 544 in the text you find that 1 km = 0.6214 miles and you know that there are 103 m/km. So we have
(5.88 x 1012 miles) x (1 km/0.6214 miles) x (103 m/km) = 9.46 x 1015 m = 9.46 Quadrillion meters
Suppose you wish to construct a scale model of the Universe. The Sun has an actual diameter of about 1.5 x 106 km, and you represent it by a dot the size of a period (0.5 mm in diameter). The average distance between stars in our region of the Milky Way Galaxy is about 5 light-years. (1 light-year = 9.5 x 1012 km)
What is the average distance between stars on the scale of your drawing? (Hint: use ratios, and keep track of your units!