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Constellations - Stars and the Solar System, Class 8 Science Video Lecture

FAQs on Constellations - Stars and the Solar System, Class 8 Science Video Lecture

1. What are constellations and how are they formed?
Ans. Constellations are groups of stars that form patterns in the sky. They are formed when a group of stars appear close to each other from our perspective on Earth. These patterns are not physically connected, but they appear to be so due to their relative positions.
2. How many constellations are there in the night sky?
Ans. There are 88 recognized constellations in the night sky. These constellations were officially defined by the International Astronomical Union (IAU) to help astronomers and stargazers navigate and study the stars.
3. Can constellations change their positions over time?
Ans. Yes, constellations can change their positions over time. This is due to the phenomenon called precession, which is caused by the Earth's wobbling motion on its axis. As a result, the positions of stars in constellations can gradually shift over thousands of years.
4. What is the difference between a star and a planet?
Ans. The main difference between a star and a planet is that a star is a celestial body that produces its own light and heat through nuclear fusion, while a planet does not produce its own light and instead reflects the light of a star. Stars are much larger and hotter than planets.
5. How does the solar system relate to constellations?
Ans. The solar system is a part of the Milky Way galaxy, which is a collection of billions of stars, including our Sun. Constellations are patterns formed by stars in the night sky, and our solar system is located within one of these constellations called the Orion Arm. The stars in constellations are much farther away from us compared to the planets in our solar system.
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