Final answer:
a) The speed of light is calculated by dividing the distance light travels in a certain amount of time. b) Estimating the age of Sirius requires complex calculations. c) The distance of Sirius from Earth can be determined by multiplying the light-years by the conversion factor of 9.5 trillion kilometers per light-year. d) The question does not provide information about other nearby stars.
Step-by-step explanation:
a) The speed of light can be calculated by dividing the distance light travels in a certain amount of time. Since light travels 9.5 trillion kilometers in 1 light-year, and there are 365.25 days in a year, we can calculate the speed of light as follows: Speed of light = Distance/Time = 9.5 trillion km / (365.25 * 24 * 60 * 60 seconds).
b) Estimating the age of Sirius is not possible with the given information. Age estimation of stars requires complex calculations that involve various factors.
c) To determine the distance in kilometers, we can multiply the distance in light-years by the conversion factor of 9.5 trillion kilometers per light-year. So, the distance of Sirius from Earth in kilometers can be calculated as: Distance = 8 light-years * 9.5 trillion km/light-year.
d) The question does not provide information about other nearby stars.