Recent content by crawleen

hey, thought i would throw this problem out there... if you have the luminosity of a red supergiant 400,000 times more luminous than the sun and a mass of 30 times greater than the sun how would you go about answering how much longer or shorter than the sun would you expect it to liv...

thank you for your help, much appreciated!

could you give me advice as to how i would go about calculating the time in years for light seen in Earth today emitted by a star whose distance is 2.6 parasecs away? i'm a bit lost... cheers!

thanks for replying... so 1 lightyear = 1year ∴ 8.6 lightyears = 8.6 years i thought i was missing some further calculations there and maybe i was just over complicating the question? crawleen!

hey folks, i was wondering if anyone could give me help on a wee problem i have. using a distance of a star of 2.6pc from earth, how would one calculate the time it took for light to be seen on Earth today... ............... my books have rounded that 1pc = 3.3 ly so i would take 2.6...