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Stars and Constellations I Video Lecture | Science for Class 6

FAQs on Stars and Constellations I Video Lecture - Science for Class 6

1. What are stars and how do they form?

Ans.Stars are massive celestial bodies made up of hydrogen and helium that produce light and heat through nuclear fusion in their cores. They form from clouds of gas and dust in space, known as nebulae, which collapse under their own gravity to create dense regions that eventually ignite nuclear fusion, leading to the birth of a star.

2. What is a constellation and why are they important?

Ans.A constellation is a group of stars that form a recognizable pattern in the night sky. They are important for navigation, as ancient sailors used them to guide their journeys. Additionally, constellations help astronomers identify and categorize stars and other celestial objects.

3. How many constellations are there, and can you name a few?

Ans.There are officially 88 recognized constellations in modern astronomy. Some well-known examples include Orion, Ursa Major (the Great Bear), and Cassiopeia. Each constellation has its own set of stars and stories associated with it.

4. How can we observe stars and constellations from Earth?

Ans.To observe stars and constellations from Earth, find a dark area away from city lights, allow your eyes to adjust to the dark, and use a star map or a stargazing app to identify different constellations. Telescopes can also enhance the view of distant stars and planets.

5. Why do stars appear to twinkle?

Ans.Stars appear to twinkle due to the Earth's atmosphere. As starlight passes through different layers of air with varying temperatures and densities, it gets refracted or bent, causing the light to change in intensity and position slightly, which creates the twinkling effect.

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Oct 02, 2025 Last updated

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