Determine the Distance to Proxima Centauri in Light-Years, If It

Q12: The greater the mass of a star,

Q13: The brightest star (apparent magnitude -1) in

Q14: What spectral class of star fits between

Q15: The two types of bright nebulae are

Q16: The apparent brightness of stars is ranked

Q18: The two types of bright nebulae are

Q19: Calculate the distance to the Sun in

Q20: The name of which astronomer is most

Q21: The _ is the name given to

Q22: Our home galaxy is called _.<br>A) M31<br>B)