Question

Fill in the blanks in the statements about parallax. As the distance to an object decreases, the observed parallax ____ . A parsec is defined as the distance to an object when the ____ is equal to one arcsecond. When the parallax is 0.1 arcseconds , the distance is ____.

Answer 1

As the distance to an object decreases, the observed parallax _Increases_ . A parsec is defined as the distance to an object when the _Angle_ is equal to one arcsecond. When the parallax is 0.1 arcseconds , the distance is _10 parsecs_.

Step-by-step explanation:

A Parallax in astronomy is the apparent displacement of an object because of a change in the observer's point of view. This is use to measure distances to nearby stars. As the distance to a star increases, the its parallax decreases and vice-versa.

Parallax formula can be express as:

d=1/p

Where:

p = parallax angle in arcseconds

d = distance in Parsecs

Parallax Second = Parsec (pc)

A star with a parallax of 1 arcsecond has a distance of 1 Parsec.

Given:

p = 0.1 arcseconds

from:

d=1/p

d=1/0.1 arcseconds

d=10 parsecs

Answer 2

increases, angle, 10 parsec

Step-by-step explanation:

d=1/p

d: distance in parsec

p: parallax in arcseconds

One parse is defined as distance at which angle subtended by an astronomical body from earth's equator is one arcsceond.