Question

All the stars in a constellation may not be at the same distance from the Earth. Explain.

Answer 1

Hint: We can define a constellation as a collection of stars that assemble together to appear like a particular shape or a picture. These patterns are sometimes imaginary. At times we need the aid of a telescope to observe the patterns formed by a constellation. However, this is clearly visible in clearer skies.

Complete answer:
We are given a statement that all the stars in a constellation may not be at the same distance from the Earth. This is a true statement because as we know, these stars appear together to form shapes or pictures from our point of view. In such a situation we feel that all the stars appear in the same space, forming images. However the reason behind this phenomenon is the large distance the stars have from our earth and also the large distance from one star to another. This moulds our views into thinking that the stars are proximate to each other, whereas they are at a very large distance from each other. This implies that their distance from our earth also shows variations. Hence we can conclude by agreeing to the given statement that all the stars in a constellation may not be at the same distance from the earth.

Note:
There are eighty eight official constellations up above the sky as per the International Astronomical Unit (IAU). They are located between the northern and the southern hemisphere hence, certain constellations can be invisible to the other hemispheres.
Phenomenon is the large distance the stars have from our earth and also the large distance from one star to another.