The closest star to Earth, after the Sun, is Proxima Centauri, which is just over 4 light years away from us. A light year is the distance traveled in one year by light, which travels at about 300,000 kilometers per second. What is the order of magnitude of the number of kilometers that separate us from Proxima Centauri

The closest star to Earth, after the Sun, is Proxima Centauri, which is just over 4 light years away from us. A light year is the distance traveled in one year by light, which travels at about 300,000 kilometers per second. What is the order of magnitude of the number of kilometers that separate us from Proxima Centauri

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter19: Celestial Distances

Section: Chapter Questions

Problem 7E: While a meter is the fundamental unit of length, most distances traveled by humans are measured in...

See similar textbooks

Similar questions

In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. The distance to Alpha Centauri, the closest star other than our own sun that can be seen by the naked eye, is 4.3 light-years. Express this distance in meters.
An astronomical unit (AU) is the average distance between Earth and the Sun, approximately 1.50 108 km. The speed of light is about 3.0 * 108 m/s. Express the speed of light in astronomical units per minute.
A small light source located 1 m in front of a 1-m2 opening illuminates a wall behind. If the wall is 1 m behind the opening (2 m from the light source), the illuminated area covers 4 m2. How many square meters will be illuminated if the wall is 3 m from the light source? 5 m? 1 0 m?
How many miles does light travel in one hour? The speed of light is 1.86x10^5 miles per second.
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. If the distance to a star is 6.1 light-years, what is this distance in meters? (There are 365.25 days in one year.)
• Radio waves travel at the speed of light, approximately 186,000miles per second. How much time does it take for a radio messageto travel from Earth to the Moon and back? (See the inside backcover for the necessary data.)
for any wave, the speed equals the wavelength times the frequency. If a photon of visible light has a wavelength of 500 nm (5 x 10-7 m) and a frequency of 6.0 x 1014 Hz, what is the speed of light (in meters per second, scientific notation)?
The speed of light is 3 x 10^8 meters per second (m/s). What is the speed of light in miles per year (mi/yr)?
What is the average speed of an object which moves 10 kilometers (km) in 30 minutes?
this is not the correct answer, I keep plugging it in and keeps coming incorrect.
If chikana walks at 4 mph, he covers a certain distance. If he walks at 9 mph, he covers 7.5 miles more. How much distance in kilometers did she actually cover?
If I drove 55 kilometers per hour, how long would the trip take one way? It takes 452 miles for the round trip and 3hrs and 4 minutes for one way.