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Question

(DO OPTION D)

Question
Choose two options from the following list. Then, in 3-5 complete sentences, explain how they are different. (Hint: Think about their characteristics and how they are formed.)

(a) Star and planet

(b) Asteroid and comet

(c) Meteoroid and comet

(d) Galaxy and constellation

Answer 1

I will choose options (a) Star and planet, and (b) Asteroid and comet.

Stars are massive celestial bodies composed mostly of hydrogen and helium that undergo nuclear fusion, producing light and heat. They are formed from the gravitational collapse of gas and dust in nebulae. In contrast, planets are smaller astronomical objects that orbit stars and do not undergo fusion; they are primarily composed of solid, liquid, or gas material and can have their own atmospheres.

Asteroids and comets are both small celestial bodies found in our solar system but have distinct characteristics. Asteroids are primarily composed of rock and metal and typically reside in the asteroid belt between Mars and Jupiter. They are generally irregularly shaped and do not possess tails. Comets, on the other hand, are made up of ice, dust, and rocky material. When they approach the Sun, the heat causes the ices to vaporize and release gas and dust, forming a luminous tail that points away from the Sun, distinguishing them from asteroids.

Answer 2

do D

Answer 3

Sure! I will explain the differences between a galaxy and a constellation.

Galaxies are vast systems that contain billions of stars, along with gas, dust, and dark matter, all bound together by gravity. They can span thousands of light-years across and exist in various forms, such as spiral, elliptical, or irregular shapes. Galaxies are large structures in the universe and are fundamental components of the cosmos.

In contrast, constellations are groups of stars that appear to form recognizable patterns when viewed from Earth. They are not physically related to each other and can be located at different distances from our planet. Constellations are often used for navigation and have cultural significance in various mythologies. Unlike galaxies, which are immense collections of stars and other materials, constellations are more about the perception of familiar patterns in the night sky rather than a physical grouping of celestial objects.