Question

Only few stars of a constellation are clearly visible through naked eyes because:
(A) those are the prominent ones
(B) those are close to the Earth while others are far away
(C) others are covered by clouds
(D) others are a myth

Answer 1

Hint: We know that constellations are formed of bright stars which appear close to each other in the sky, but are really far apart in space. Because of the rotation of the Earth and its orbit around the Sun, we divide the constellations into two groups. Some constellations never rise nor set, and they are called circumpolar. The constellations are totally imaginary things that poets, farmers and astronomers have made up over the past 6,000 years (and probably even more!). The real purpose for the constellations is to help us tell which stars are which, nothing more. On a really dark night, you can see about 1000 to 1500 stars.

 Complete step by step answer
We know that a constellation is a group of stars that appears to form a pattern or picture like Orion the Great Hunter, Leo the Lion, or Taurus the Bull. Constellations are easily recognizable patterns that help people orient themselves using the night sky. There are 88 “official” constellations. The 12 constellations in the zodiac family can all be seen along the ecliptic. They are: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpius, Sagittarius, Capricornus, Aquarius and Pisces.
Constellation, in astronomy, any of certain groupings of stars that were imagined—at least by those who named them—to form conspicuous configurations of objects or creatures in the sky. Constellations are useful in tracking artificial satellites and in assisting astronomers and navigators to locate certain stars.
We know that many stars form the constellation but only few of them shine brightly and can be seen through naked eyes clearly. These are the prominent stars of the constellation and those help in locating the constellation.

So, the correct answer is option A.

Note: We know of thirty-six principle Egyptian groups that date to 1,100 B.C., that include the northern constellations of Ursa Major and Orion. Older still were the first recorded constellations of ancient Mesopotamia, now placed in southern Iraq. The description of Hydra as the largest constellation in the sky refers to its total area in square degrees, according to the official boundaries established by the International Astronomical Union (IAU). Hydra covers 1,303 square degrees, or 3 percent of the celestial sphere.