Celebrating the 55th anniversary of The Sky at Night, this book collects questions sent in by viewers and fans, answered by Sir Patrick Moore and Sky at Night co-presenter Dr Chris North.

With sections on the solar system, cosmology, the bizarre and unexplained, space missions, the Moon, and more, this is an exciting journey into space for the novice astronomer and the lifelong stargazer alike.

Discover how scientists work out the gravity of planets, how we measure the distances to stars and how fast we're moving through space. Find out what the 'Great Attractor' is, what makes up stardust, and the basic principles of space navigation. Learn how to start observing the sky, what event inspired Patrick to take up astronomy, and just how many of his cats are named after celestial bodies.

From comets to black holes, Orion to eclipses, and Mercury to meteors, The Sky at Night is the ultimate introduction to the wonders and mysteries of the universe.

Questions about the Moon, the Solar System, space travel, other planets and more - answered by Britain's best-loved astronomer