SCIENCE
PHYSICAL SCIENCES
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[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -The Hubble sequence divides regular galaxies into three broad classes: elliptical; lenticular and spiral. A fourth class is used for galaxies with irregular appearance.
Detailed explanation-2: -Types of Galaxies Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.
Detailed explanation-3: -A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. When you look up at stars in the night sky, you’re seeing other stars in the Milky Way.
Detailed explanation-4: -Edwin Hubble invented a classification of galaxies and grouped them into four classes: spirals, barred spirals, ellipticals and irregulars.
Detailed explanation-5: -Spiral. Elliptical. Barred spiral. Irregular.