1. How does a planet differ from a star?
2. Why is planet Venus called the Morning star and also the earth's twin?
What is a galaxy ? Name the three types of galaxies.
4. Why is the earth called a unique planet?
5. Why are the meteors called "shooting stars"?
6. What is the universe ?
Answers
Answer:
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Explanation:
1. Stars are very big and hot celestial bodies made up of gases. They have their own heat and light, which they emit in large amounts. Planets: Planets are celestial bodies, usually smaller than stars. They do not have their own heat and light.
2.The Earth and Venus do often get called planetary twins, and this is largely because they are very close to being the same mass.Venus is normally referred to as the evening star because it can be seen shining in the evening sky right after the sun sets in the west. This planet is also called the morning star when its orbital position changes causing it to appear bright in the morning rather than in the evening.
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. Some scientists think there could be as many as one hundred billion galaxies in the universe. most fall into one of three categories: spiral, elliptical or irregular.
4. this most special of attributes, planet Earth has a number of ideal features. It is unique among planets in our solar system for having water in its liquid form at the surface, in an amount conducive to life evolving.
5.The sand-sized grains of dust sometimes slam into the thin air that surrounds the Earth, called the atmosphere, where they get hot very quickly. As the dust grains burn up, they leave bright streaks of light across the night sky. These streaks are called meteors, often nicknamed 'shooting stars' or 'falling stars'.
6. The Universe is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, dust clouds, light, and even time. Before the birth of the Universe, time, space and matter did not exist..
ANSWER
1) The main difference between stars and planets is that stars have high temperatures compared to planets. Stars undergo nuclear reactions—they burn hydrogen in their cores, releasing massive amounts of energy. ... They must have a mass of at least 75 times that of Jupiter, the largest planet in the Solar System.
2) Venus is one of the four solar terrestrial plants, meaning that, like the Earth, it is a rocky body.In size and mass, it is very similar to the Earth and why it is often described as Earth's "sister" or "twin".
4) It is described as a unique planet because it is the only planet of the solar system known to support life. Earth has water in all three states - liquid, solid and gaseous.
5) The sand-sized grains of dust sometimes slam into the thin air that surrounds the Earth, called the atmosphere, where they get hot very quickly. As the dust grains burn up, they leave bright streaks of light across the night sky. These streaks are called meteors, often nicknamed 'shooting stars' or 'falling stars'.
6) The Universe is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, dust clouds, light, and even time. Before the birth of the Universe, time, space and matter did not exist. ... All we do know is that the visible Universe is at least 93 billion light years across