# Galaxies and Hierarchic Structures in the Universe Practice Questions

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Cosmology Learning Material
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22.6Galaxies and Hierarchic Structures in the Universe

## Galaxies and Hierarchic Structures in the Universe Revision Questions

1. What is the revolution speed of Sun around the centre of Milky Way galaxy? Take 1 light year = 9.46 × 1012 km.

1. 8315 km/h
2. 260 km/h
3. 948.5 km/h
4. 8766 km/h

2. The diameter of Local Group is about 10 million light years. What part of diameter would the galaxies contained in this group occupy if all galaxies had the dimensions of Milky Way and all of them were aligned in a row?

1. 6 900 000 light years
2. 3 100 000 light years
3. 9 900 000 light years
4. 100 000 light years

3. How far from the Sun is the closest periphery of Milky Way bulb?

1. 28 000 light years
2. 72 000 light years
3. 18 000 light years
4. 23 000 light years

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