Chapter 1, Problem 1RQ

To determine

The description of Milky Way when observed with the naked eye.

Answer to Problem 1RQ

Option (e)

Explanation of Solution

Galaxy is defined as the group of stars, star cluster gas and dust and every galaxy is located far away from one another.

Collection of all the things called as universe; it contains stars, planets, galaxies, dust, gas, dark matter and all other things that are known. Milky Way Galaxy is the part of the universe and is one of the millions of galaxies that exist in the universe.

Solar System is the part of Milky Way Galaxy; it contains eight planets, dwarf planets, asteroid and other astronomical object with Sun as only Star; all the objects orbit around the Sun directly and indirectly.

Conclusion:

Milky Way is the collection of stars of which Sun is also the part ad stars and Sun both are visible with the naked eye. Thus, option (e) is correct.

The path taken by planet across the sky is imaginary so it cannot be observed. Thus, option (a) is incorrect.

Debris left by the motion of planets is found nearby stars, it is the part of Milky Way which is not visible by naked eye. Thus, option (b) is incorrect.

When comets collide they result in debris but that happens in space so it is not visible by naked eye. Thus, option (c) is incorrect.

The asteroid belt exists between terrestrial planets and giant planets and it is visible using telescope. Thus, option (d) is incorrect.

Due to scattering on sun light from water vapour in the atmosphere, rainbow is obtained and it is not part of Milky way, it is a natural phenomenon. Thus, option (f) is incorrect.