How is proper motion measured?

What will be an ideal response?


It is the apparent motion of the star, in seconds of arc, over an interval of exactly one year, after the Earth returns to the same place in its orbit, and all parallax is negated.

Physics & Space Science

You might also like to view...

LC Circuits: What capacitance is needed in series with a 3.7-mH inductor so the circuit will oscillate at a frequency of 1000 Hz?

A. 0.15 mF B. 15 ?F C. 6.8 ?F D. 0.015 ?F

Physics & Space Science

The polarity of the voltage in a circuit operating at 60 Hz reverses

A) 90 times per second. B) 30 times per second. C) 10? times per second. D) 120 times per second. E) 60 times per second.

Physics & Space Science

The center of mass of an object does not have to be located within the object

Indicate whether the statement is true or false

Physics & Space Science

1 If the person shown here on the ground is in an inertial reference system, his friends in the van moving by at constant velocity are also in an inertial reference system. True False

Indicate whether the statement is true or false

Physics & Space Science