Static GK Universe in English
Static GK Universe
General knowledge questions are common in competitive exams held at the all-India or state level. Furthermore, the scope of general knowledge is also vast. By studying static GK questions from various topics, we will discuss several specific topics in detail. In this case, the topic being discussed is Static GK Universe.
Static GK Universe
1. What is meant by Universe?
A: The unimaginably vast space, consisting of millions of galaxies, billions of stars, planets, asteroids, planetary clusters, comets, halos and their intervening hidden matter, dust clouds, gases, dark energy, etc. – which are theoretically known to us, but not directly observed, is called the universe or the universe. The diameter of our observable universe is about 28 billion parsecs or 91 billion light years.
2. What are the elements of the universe?
A: When we observe the universe, we see the combination of several elements. Some of the elements of which are: i) Super Cluster ii) Cluster of Galaxy, iii) Nebula, iv) Black Holes, v) Star, vi) Planet, vii) Asteroids, viii) Satellite, ix) Comet, x) Meteors are among them.
3. What is meant by Super Cluster?
A: The largest form of the structural elements of the universe known and observable so far is the Super Cluster [which translates into Bengali as ‘Maha Cluster’ (this translation is not accepted)]. This super cluster is made up of numerous small and large galaxy clusters. The existence of super clusters was first discovered in the 1980s.
4. What is the expansion of the super cluster?
A: These superclusters cover about 5% of the area of our observable universe. They are almost uniformly distributed in the region from 100 million light years to 10 billion light years. Static GK Universe
5. Who first proposed the concept of superclusters?
A: American academic George Ogden Abell first proposed the concept of superclusters in his 1958 paper “The distribution of rich clusters of galaxies. A catalogue of 2,712 rich clusters found on the National Geographic Society Palomar Observatory Sky Survey” (known as the “Abell catalogue” for short). He called such cosmic structures “Second-order Clusters” or “Clusters of Clusters”.
6. What are the relatively well-known superclusters?
A: The relatively more discussed superclusters are: Laniakea Supercluster, Virgo Cluster, Hydra-Centaurus Supercluster, Pavo-Indus Supercluster, Southern Supercluster and Saraswati Supercluster etc.
7. Which is the first milestone of Indian scientists in the search for superclusters?
A: The discovery of a giant supercluster called Saraswati Supercluster, located 400 billion light-years away from Earth and consisting of 43 galaxies, by a research team led by Bengali Astrophysicist Prof Joydeep Bagchi and the Indian Institute of Science Education and Research through the Sloan Digital Sky Survey – DR12 in July 2017, was the first milestone of Indian scientists in the search for superclusters.
8. Which is the next largest element after the supercluster in the formation of the universe?
A: The next largest element after the supercluster in the formation of the universe is: Cluster of Galaxy. Under the influence of gravity, a galaxy cluster is formed by a combination of 100 to 1000 or more galaxies.
9. What are the structural elements of a galaxy cluster?
A: A galaxy cluster is formed by three main elements. These structural elements are: i) Galaxies, ii) Intergalactic gas in intracluster medium and iii) Dark matter. Of these elements, 90% Dark matter, 9% Intergalactic gas and only 1% galaxies form a galaxy cluster. Static GK Universe
10. What are the important galaxy clusters?
A: The important galaxy clusters are: The Local Group, Virgo Cluster, Fornax Cluster, Hercules Cluster, Bullet Cluster and Coma Cluster etc. Static GK Universe
11. What is meant by Galaxy?
A: A galaxy is a special cosmic structural element composed of countless stars, countless planets, their satellites, interstellar dust-gas, dark matter, etc. under the influence of gravity. Some galaxies consist of black holes at their centers.
12. How many galaxies are there in the universe?
A: More than 2 trillion galaxies have been found in our observable universe so far.
13. What is a nebula?
A: A nebula is a special structural state within a galaxy, where stars are destroyed or created. Generally speaking, a nebula is a giant cloud composed of interstellar dust, gas, and cosmic matter. According to NASA – “A nebula is a giant cloud of dust and gas in space. Some Nebula (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other Nebula are regions where new stars are beginning to form.”
14. What is the literal meaning of the word “Nebula”?
A: The word Nebula is a Latin word, which means “mist, vapor, fog, smoke, exhalation” etc.
15. Who first gave the idea about the existence of Nebula?
A: The Persian astronomer Abd al-Rahman al-Sufi found the existence of “a little cloud” while observing the Andromeda Galaxy in 0964. He mentioned this observation in the book “Book of Fixed Stars” and from there the first idea about the existence of this cosmic element is available.
16. Who discovered the first nebula on a scientific basis?
A. French astronomer Nicolas-Claude Fabri de Pieresc discovered the first nebula called ‘Orion Nebula’ in 1610, which was re-observed by Johann Baptist Cysat in 1618.
17. Who gave the first detailed idea about nebulae?
A. Dutch astronomer Christiaan Huygens gave the first detailed idea about nebulae in his work “De vi centrifuga” in 1659, which was published after his death in 1703 under the title “Concerning the centrifugal force”.
18. What other names are nebulae popular among space scientists?
A. Nebulae are popular among space scientists as “Nursery for New Stars”.
19. What are the main gaseous components of nebulae?
A: The main gaseous components of the nebula are: Hydrogen 90% and Helium 10% which are also considered as the main components of a star.
20. In how many parts can a nebula be divided?
A: Nebula can be primarily divided into two groups, namely: A) Galactic Nebula and B) Extragalactic Nebula.
21. What is Extragalactic Nebula?
A: Extragalactic Nebula is a large star formation consisting of numerous stars. This is the former name of ‘Galaxy’. Detailed information is not available about this.
22. How many types of Extragalactic Nebula are there?
A: Edwin Havel has divided Extragalactic Nebula or Non-galactic Nebula into four parts, namely Spiral, Elongated, Globular and Irregular etc.
23. How many Extragalactic Nebula are there?
A: According to the research of E. P. Hubble, about 400 Extragalactic Nebulae have been found to exist so far.
24. What is Galactic Nebula?
A: This type of nebula is a nebula within a specific galaxy.
25. How many types of Galactic Nebula are there?
A: Galactic Nebula is mainly divided into two parts, namely: i) Diffuse Nebula and ii) Planetary Nebula ➣ Next Part
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