Question

If our galaxy were 1m wide, what would the distance to the Andromeda Galaxy be?

The distance to Andromeda Galaxy is: 2.4 x 1022 m (or 24,000,000,000,000,000,000 km),
and the size of our galaxy is: 9.5 x 1020 m (or 950,000,000,000,000,000 km)

Answer 1

• 25 m

Explanation:

The scale factor is

• 1 : 9.5×10²⁰ as we make our galaxy as small as 1 m.

The distance to Andromeda would be:

• 2.4×10²² * 1/9.5×10²⁰ =
• 2.4/9.5×10²²⁻²⁰ =
• 0.25×10² =
• 25 m