The spiral galaxy in the Andromeda constellation is about 2 * 1019 km away from us. How many light-years is this?

1. 3.48837 * 106 c.

2. 1.62791 * 106 c.

3. 7.39958 * 105 c.

4. 1.08668 * 107 c.

5. 2.11416 * 106 c.

6. 5.09514 * 106 c.

Question

Ingrid Parsons

Physics

18 January, 14:34

The spiral galaxy in the Andromeda constellation is about 2 * 1019 km away from us. How many light-years is this?

1. 3.48837 * 106 c.

2. 1.62791 * 106 c.

3. 7.39958 * 105 c.

4. 1.08668 * 107 c.

5. 2.11416 * 106 c.

6. 5.09514 * 106 c.

+2

Answers (1)

Know the Answer?

Shiloh Melendez · Answer 1

5. 2.11416 * 10^6 c.

Explanation:

First thing to Know is the conversion factor from km to light year which is

1 kilometre =

1.057 * 10-13 light-year.

So

2 * 10^19 km is equal to

2 * 10^19 * 1.057 * 10-13

2 * 10^19 km = 2.114 * 10^6c

The spiral galaxy in the Andromeda constellation is about 2 * 1019 km away from us. How many light-years is this?1. 3.48837 * 106 c.2. 1.62791 * 106 c.3. 7.39958 * 105 c.4. 1.08668 * 107 c.5. 2.11416 * 106 c.6. 5.09514 * 106 c.

The spiral galaxy in the Andromeda constellation is about 2 * 1019 km away from us. How many light-years is this?

1. 3.48837 * 106 c.

2. 1.62791 * 106 c.

3. 7.39958 * 105 c.

4. 1.08668 * 107 c.

5. 2.11416 * 106 c.

6. 5.09514 * 106 c.