Astronomers use a light-year to measure distance. A light-year is the distance light travels in one year. The speed of light is approximately 300,000 km/sec.

a. How long is 1 light-year in kilometers?

b. The nearest star (other than the sun) is Alpha Centauri. It is 4.34 light-years from Earth. How far is that in kilometers?

c. How long will it take a rocket traveling

65, 000

km/hr to reach Alpha Centauri?

a. 1 light-year equals=enter your response here

kilometers

(Use scientific notation. Use the multiplication symbol in the math palette as needed. Do not round until the final answer. Then round to the nearest hundredth as needed.)

b.4.34 light-yearsequals=enter your response here

km

(Use the answer from part a to find this answer. Use scientific notation. Use the multiplication symbol in the math palette as needed. Type an integer or decimal rounded to the nearest hundredth as needed.)

c.It will take

enter your response here

hours to reach Alpha Centauri.

(Use the answer from part b to find this answer. Use scientific notation. Use the multiplication symbol in the math palette as needed. Type an integer or decimal rounded to the nearest hundredth as needed.)