Showing results by publisher "HarperAudio" in Astronomy & Space Science

At the heart of the Milky Way, there is a distortion in the fabric of the Universe. Caused by something 4 million times bigger than our Sun, it is where space and time are so warped that everything within 12 million kilometres is trapped, even light. This region of no return is called the event horizon, and inside it lies the end of time as we know it. We have named it Sagittarius A* and it is a supermassive black hole. Black holes lie where the most massive stars used to shine and at the edge of our current understanding.

When Charles Darwin finished The Origin of Species, he thought that he had explained every clue but one. Though his theory could explain many facts, Darwin knew that there was a significant event in the history of life that his theory did not explain. During this event, the "Cambrian explosion", many animals suddenly appeared in the fossil record without apparent ancestors in earlier layers of rock. In Darwin's Doubt, Stephen C. Meyer tells the story of the mystery surrounding this explosion of animal life.

In the aftermath of World War II, the United States accelerated the development of technologies that would give it an advantage over the Soviet Union. Airpower, combined with nuclear weapons, offered a formidable check on Soviet aggression. In 1947, the United States Air Force was established. Meanwhile, scientists and engineers were pioneering a revolutionary new type of aircraft which could do what no other machine had ever done: reach mach 1 - a speed faster than the movement of sound - which pilots called "the demon."

In 1959, the Soviet probe Luna 3 took the first photos of the far side of the Moon. Even in their poor resolution, the images stunned scientists: The far side is an enormous mountainous expanse, not the vast lava plains seen from Earth. Subsequent missions have confirmed this in much greater detail. How could this be, and what might it tell us about our own place in the universe? As it turns out, quite a lot. When the Earth Had Two Moons is an astonishing exploration of planet formation and the origins of life by one of the world’s most innovative planetary geologists.

When scientists discovered the first ocean beyond Earth, they had two big questions: “Is it habitable?” and “How do we get there?” To answer the first, they had to answer the second, and so began a vivacious team’s twenty-year odyssey to mount a mission to Europa, the ocean moon of Jupiter. Standing in their way: NASA, the White House, Congress, rivals in academia, and even Jupiter itself. Written with verve, humor, and uncanny empathy, The Mission is an exuberant masterclass in how a few determined cogs can change an entire machine.

In this astonishing rediscovery of the final Apollo moon landings, the acclaimed author of Chesapeake Requiem reveals that these extraordinary yet overshadowed missions - distinguished by the use of the revolutionary lunar roving vehicle - deserve to be celebrated as the pinnacle of human adventure and exploration.

Using the power of the sun, moon, stars, and planets, this unique guide is filled with engaging exercises that deepen your knowledge of the solar system, help you take necessary pauses every day, and foster a renewed sense of presence in the universe.