How far away (in ly) is the star closest to the Sun? lyWhat is its name?PolarisProxima Centauri    SiriusTau Ceti

What is the closest star to our sun?Group of answer choicesAlpha CentauriBetelgeuseSiriusPolaris

Proxima Centauri is the closest star to Earth after the sun and it is 4×1013  km4×10 13   km away! We can calculate how long it takes light to travel from this star to earth by dividing its distance from earth by the speed that light travels, which is 1×109  km/hr1×10 9   km/hr.  Evaluate the expression below using index notation to determine how long it takes light from Proxima Centauri to reach Earth in hours. 4×10131×1091×10 9 4×10 13 ​  Remember to include units with your answer.

A star has a parallax of .05", its distance is Group of answer choices5 light years.20 parsecs.200 parsecs.660 light years.

Is the star Polaris bigger or smaller than our Sun?BiggerSmaller

What is the brightest star in the night sky when viewed from Earth?Group of answer choicesPolarisBetelgeuseRigelVY Canis MajorisStephenson 2-18Sirius