SOLAR SYSTEM

Detailed explanation-1: -Universe, galaxies, solar system, star, earth, moon, and asteroid are listed in order of size from largest to smallest. Explanation: Let’s describe them one by one, from smallest to biggest.

Detailed explanation-2: -If you were to order the planets by size from smallest to largest they would be Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn and Jupiter. Jupiter and Saturn are sometimes called the gas giants, whereas the more distant Uranus and Neptune have been nicknamed the ice giants.

Detailed explanation-3: -The solar system is the smallest when it is compared with the size of a galaxy and the Universe. Most of the hundreds of billions of stars in our galaxy are thought to have planets of their own, and the Milky Way is but one of perhaps 100 billion galaxies in the Universe.

Detailed explanation-4: -Mass. The Milky Way is approximately 890 billion to 1.54 trillion times the mass of the Sun in total (8.9×1011 to 1.54×1012 solar masses), although stars and planets make up only a small part of this.

Detailed explanation-5: -The radius of the observable universe is therefore estimated to be about 46.5 billion light-years and its diameter about 28.5 gigaparsecs (93 billion light-years, or 8.8×1026 metres or 2.89×1027 feet), which equals 880 yottametres.