help with these questions

Compare the brightness of venus which has an apparent magnitude (m)of -4.6 to a full moon, which has an apparent magnitude of -12.7

The star Sirius has a magnitude of -1.6, and the star costor has a magnitude of 1.6. what is the ratio of their brightness ;

The star vega is 24×1014 km away from earth . what the distance in light years

 
Do you need a similar assignment done for you from scratch? We have qualified writers to help you. We assure you an A+ quality paper that is free from plagiarism. Order now for an Amazing Discount!
Use Discount Code "Newclient" for a 15% Discount!

NB: We do not resell papers. Upon ordering, we do an original paper exclusively for you.