With new breakthroughs happening daily, astronomy is more exciting than ever. Understand the science's essential and exciting milestones with our fact-filled, picture-rich, accessible guide, updated to include recent developments such as the New Horizons spacecraft's 2015 encounter with Pluto and 2019 rendezvous with a Kuiper belt object. Originally published as The Universe, this revised, updated, and renamed reference book and timeline traces how, over many centuries, great minds have determined our planet's place in the great expanse of the Universe.

From the megalithic cultures of Stonehenge and Carnac to today's search for alien planets and dark matter, Astronomy includes:

• 100 milestone facts, labeled " Ponderables " which detail pivotal breakthroughs by scientists, ancient and modern, in understanding the Universe, stars, and planets.
• Stunning astronomical imagery and illustrations to help clarify key concepts.
• An overview of core concepts in Astronomy 101: The Basics and biographies of key scientists.
• A section on imponderable concepts that researchers still don't fully understand.
• A removable fold-out 12-page Timeline History of Astronomy and a 12-page Guide to the Night's Sky which shows the constellations visible in the Northern and Southern Hemispheres month by month.