Question

which star is the brightest—besides our sun?
stars\tdistance from earth in light - years\tapparent magnitude
sun\tn/a\t-26.74
sirius\t8.60\t-1.46
canopus\t313.00\t-0.72
arcturus\t37.00\t-0.04
rigel\tn/a\t-0.01
kentaurus\t4.36\t-0.01
vega\t25.00\t-0.03
capella\t42.00\t-0.08
rigel\t775.00\t-0.12
options: canopus, sirius, rigel kentaurus, rigel

Explanation:

Step1: Recall Apparent Magnitude

Apparent magnitude measures a star's brightness as seen from Earth. Lower (more negative) values mean brighter stars.

Step2: Exclude the Sun

The Sun has an apparent magnitude of -26.74. We need the brightest star besides the Sun, so we look at the other stars' apparent magnitudes.

Step3: Compare Magnitudes

Check the apparent magnitudes of the other stars: Sirius (-1.46), Canopus (-0.72), Arcturus (-0.04), Rigel (-0.01), Kentaurus (-0.01), Vega (-0.03), Capella (-0.08), Rigel (-0.12). The lowest (brightest) among these is Sirius with -1.46? Wait, no—wait, Kentaurus? Wait, no, wait the table: Wait, Kentaurus (Rigel Kentaurus?) has -0.01? Wait, no, let's re - check. Wait, the stars: Sirius has -1.46, Canopus -0.72, Arcturus -0.04, Rigel -0.01, Kentaurus (Rigel Kentaurus) -0.01? Wait, no, maybe I misread. Wait, the apparent magnitude column: Sun is -26.74. Then Sirius: -1.46, Canopus: -0.72, Arcturus: -0.04, Rigel: -0.01, Kentaurus (maybe Alpha Centauri? Rigel Kentaurus? ) -0.01, Vega: -0.03, Capella: -0.08, Rigel: -0.12. Wait, no, the lowest (most negative) after Sun is Sirius? Wait, no, -1.46 is more negative than -0.72, -0.04, etc. Wait, but wait, maybe I made a mistake. Wait, the options are Rigel, Rigel Kentaurus, Sirius, Canopus. Let's check their apparent magnitudes: Sirius: -1.46, Canopus: -0.72, Rigel: -0.12, Rigel Kentaurus (maybe Alpha Centauri) has -0.01? Wait, no, the table: the row for Kentaurus (Rigel Kentaurus) has apparent magnitude -0.01? Wait, no, looking at the table again (from the image):

Stars: Sun (-26.74), Sirius (-1.46), Canopus (-0.72), Arcturus (-0.04), Rigel (-0.01), Kentaurus (-0.01), Vega (-0.03), Capella (-0.08), Rigel (-0.12). Wait, but the options are Canopus, Sirius, Rigel Kentaurus, Rigel. Wait, the apparent magnitude of Sirius is -1.46, which is more negative (brighter) than Canopus (-0.72), Rigel (-0.12), and Rigel Kentaurus (-0.01). So Sirius has the lowest (most negative) apparent magnitude among the stars besides the Sun, meaning it is the brightest.

Answer:

Sirius (the option with Sirius, which is the third option in the radio buttons: Sirius)