Wednesday
August 5, 2015

Homework Help: Science

Posted by Timothy on Wednesday, June 20, 2012 at 7:38pm.

ive got 2 questions:

the star Vega is 25 lightyears away from us. if we sent a radio message to Vega, and another civilization on a planet circling that star answered us, in what year could we expect to hear a reply?

why was it necessary to make radio telescopes so much bigger than optical telescopes?

i looked in my textbook but i couldnt find the answer

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Members