Stars PT 1

Question 1

Magnitude Scale

Answer 1

A scale showing the apparent brightness of stars , brighter stars have lower magnitude numbers

Question 2

Apparent Magnitude

Answer 2

The apparent brightness of something as seen from wherever the observer is

Question 3

Absolute Magnitude

Answer 3

The brightness of something as seen at a standard distance of 10 parsecs.

Question 4

Parallax

Answer 4

Closer objects appear to move faster than objects that are farther away

Question 5

Stellar Parallax

Answer 5

Observe a star at one spot in its orbit and then observe again at another point in its orbit(6 months later), you can find the parallax angle.

Question 6

Determining stellar luminosity,

Answer 6

. It depends on both the radius of the star and on its surface temperature. One can calculate luminosity by finding the product of 1) how much energy each section of the surface of a star is producing (σT4, the Stefan-Boltzmann Law) and 2) the entire surface area of the star

Question 7

What is stellar luminosity

Answer 7

Luminosity is the total energy that a star produces in one second.