One of the methods used widely to calculate the distance of nearby or closer objects in astronomy is Parallax. The distance of the stars are usually expressed in light years but the unit of distance is parsec or parallax second.
1 Parsec = 3.26 light years
Astronomers are not able to measure the parallax of a star that is a million light years away because the star is too far and the distance with which the start appears to move is too less to be calculated accurately.
The dense fog covered the town. The alarm rang earlier than usual
this morning. Explanation: “The alarm rang earlier than usual this morning” and “The dense fog covered the town” are details about the time and place. They are pieces of textual evidence that describe the setting.
