Star System Definition: Galaxy Explained
The question asks to identify the term for a massive cosmic structure containing billions of stars, along with clouds of dust and gases.
Analyzing Celestial System Options
Let's examine each option:
- Universe: This refers to all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. It is much larger than the described system.
- World: This term typically refers to a planet or a specific region, not a vast collection of stars and gas.
- Galaxy: A galaxy is precisely defined as a gravitationally bound system comprising billions of stars, stellar remnants, interstellar gas, dust, and dark matter. This perfectly matches the question's description.
- Constellation: A constellation is a pattern or group of stars visible in the night sky, often named after mythological figures or animals. It's an apparent pattern, not a massive physical system of stars, dust, and gas.
Based on the definitions, a huge system of billions of stars, dust, and gases is known as a Galaxy.
Similar Questions
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Important Questions from Origin and evolution of Universe Solar system
Which one of the following is the correct sequence of arrangement of the given planets in descending order of their density (in gm/cm3)?
Which one of the following astronomers proved that the Earth and other planets revolve around the Sun?
If it is 12 noon in New Delhi, what will be the time in London, UK?
Which one of the following statements is true?
The Prime Meridian does not pass through which one of the following African countries?
