A star is 4.3 light years away from the earth. What does it mean?

Open in App

Solution

Dear student

Light year is unit of distance which means distance travelled by light in a year.
1 light year = $9.461 \times 10^{12} k i l o m e t r e s$
So, 4.3 light year = 40.6823 $\times 10^{12}$ kilometres

with regards

Suggest Corrections

Similar questions

Q. Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth? [3 MARKS]

Q. Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?

Tarun got to know from his elder brother that sun is the nearest star and is approximately 150 million kilometers away from the earth. He wanted to know which is the next nearest star and what is its distance from the earth. His tutor told him that the nearest star is alpha century and is at a distance of 4.3 light years from the earth. Tarun does not know what a light year is. Can you tell him?

Q. Match the columns

A	B
(1) Speed of light	(a) 4.3 light years away from earth
(2) Light year	(b) 300,000 km/s
(3) Sun	(c) Nearest star
(4) Alpha Centauri	(d) distance travelled by light in one year
	(e) 18 light minutes away from the Earth

Q. The distance of the star Proxima Centauri from the Earth is
(a) 4.3 million kilometres.
(b)

8 \frac{1}{4}

light minutes.
(c) 2 million light years.
(d) 4.3 light years.

Join BYJU'S Learning Program

A star is 4.3 light years away from the earth. What does it mean?

Dear student Light year is unit of distance which means distance travelled by light in a year. 1 light year = 9.461 × 1012 kilometres So, 4.3 light year = 40.6823 ×1012kilometres with regards

Dear student

Light year is unit of distance which means distance travelled by light in a year.
1 light year = $9.461 \times 10^{12} k i l o m e t r e s$
So, 4.3 light year = 40.6823 $\times 10^{12}$ kilometres

with regards