​​ECR Green

Hobbies & interests

By Mohan Babu

Questions

1) What is an astronomical unit? 

2) Name the two planets whose orbits form the boundary of the main asteroid belt in solar system.

3) Name the object that is popularly called as the "morning star".

4) Name the only neighboring galaxy that is visible to naked eye from northern hemisphere. (though visible

only in dark locations away from city lights)

​5) Who was the first person to spot the moons of Jupiter?

6) Name the biggest moon of Saturn.

7) Name the two satellite galaxies of our milky way visible from Southern hemisphere.

8) Name the main astronomical phenomenon causing seasonality on our planet Earth?

9) Name the brightest star in night sky (brightest star, not the brightest planet)

​10) Name the principle behind measuring astronomical distances (one can consider giving a clue, if needed. This principle is also used in 3-D movies though I am less sure how much this clue would help).


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Answers

1) The mean distance between the Sun and our planet Earth is one astronomical unit. This distance is nearly 150 million kilometers.

2) Jupiter and Mars

3) Planet Venus is popularly known as the "morning star", Interestingly, it stays either as a morning star or an evening star at various points of time.

4) Andromeda galaxy located at around 2.5 million light years from earth. Most of us would not have seen this galaxy as it washed out by the light pollution caused by human race.

5) Galileo Galilei. These moons are also popularly called the "Galilean moons",

6) Titan is the biggest moon of Saturn.

7) Large magellanic cloud and the small Magellanic cloud.

8) The tilt in Earth's axis.

9) Sirius is the brightest star in night sky. Located closer to the famous Orion group, it is easier to spot. Venus and Jupiter are brighter than Sirius.

10) Parallax principle (when we view an object with two eyes, we get different images on both eyes since the angle of vision is slightly different. The nearer objects seem to shift more than the farther objects and thus our minds perceive the depth or the 3-D effect)

girls boys astronomy quiz

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