Sean G RyanSean Ryan is Professor of Astrophysics and Head of the School of Physics, Astronomy and Mathematics at the University of Hertfordshire. Prior to this he worked for the Open University, contributing to the development of courses in physics and astronoy. Read More Read Less
An OTP has been sent to your Registered Email Id:
Resend Verification Code
Hi! I'm Vidya, your virtual assistant.
Need a book recommendation, help with your order or support with any query? I’m here to assist you.
