Earth Space Science

If a black hole is not a hole, then what is it? Find out what black holes are, what causes them, and how scientists first discovered them. Learn how astronomers find black holes, get to know our nearest black-hole neighbor, and take a journey that will literally s-t-r-e-t-c-h the mind.

Ancient people from many different cultures - Greek, Roman, Mezo-American, Arab - all looked up and imagined pictures in the sky by "drawing" a line from one star to another, like a connect-the-dots puzzle. These star pictures - constellations - represented myths and legends from the various cultures that still fascinate us today.

Learn all about our solar system through a fantastic adventure in this audiobook.

Making earth science accessible and entertaining, The Wondrous Workings of Planet Earth explains how our planet works - and how we can protect it - from its diverse ecosystems and their inhabitants to the levels of ecology, the importance of biodiversity, the cycles of nature, and more. Science- and nature-loving listeners of all ages will delight in this utterly charming guide to our amazing home.

2012 - Mankind steps onto the moon's surface for the second time. Three hundred years later, mankind has colonized several planets within our solar system. But the time of prosperity and growth is about to come to an end. Alien forces begin invading the solar system, leaving nothing in their wake. It is up to Earth's newly created fleet of war ships to defend the system.

Decades have passed since the war ended and the United Systems of Earth have expanded further into the Cluster, setting up colonies on nearly every planet charted. But a new threat is growing, and when several colonies are attacked, the USES Dauntless is ordered to investigate.

Jane is the only person left on the planet, minding the only business left: a gift shop. She wasn’t born on Earth, but her ancestors were; they lived there before the AI in charge of geoengineering failed and the oceans got too hot to sustain the terrestrial food web and before humans took off to colonize other planets. She’s heading to college on Jupiter in the fall of 3020, so her days on the home planet—selling “American Epoch” postcards, “History: The Poster!” and “War: The Soundtrack” to tourists from the suburbs of Europa—are numbered.

Agartha is like an enchanted place hidden in the core of the world; even though it is an open door, it can't be entered without the permission of those who live there. Admiral Byrd mentioned in his diary that he came across a highly advanced city way beneath the surface. Who was Admiral Byrd? And could a hollow planet really exist?

What do you know about the Moon? Give curious kids a first look into space.

What do you know about Mars? Give curious kids a first look into space.

Despite its guise as a space pirate, the Dread Remora is still a ship of Her Majesty's Royal Navy, so when Captain Nate Demming and his crew discover a brutally savaged ship, they are appalled. When a second ship appears and attacks, Demming assumes these must be the predators and retaliates. The events that unfold lead to new discoveries for the Dread Remora, including some potential allies - and a ferocious new enemy.

As end-of-the-world scenarios go, an apocalyptic collision with an asteroid or comet is the new kid on the block, gaining respectability only in the last decade of the 20th century with the realization that the dinosaurs were wiped out by just such an impact. Now the science community is making up for lost time, with worldwide efforts to track the thousands of potentially hazardous near-Earth objects and plans for high-tech hardware that could deflect an incoming object from a collision course.

Dr. Rebecca Carter stood at the front of a crowded auditorium, the bright lights shining down on her as she addressed the audience. She spoke with conviction, her voice filled with intelligence and determination. "But we can't afford to ignore the evidence any longer," she argued, her eyes flashing with intensity. "These solar flares are unlike anything we've ever seen before. They're increasing in frequency and intensity, and if we don't act soon, Earth will be destroyed."

"They landed in California, in Sequoia National Park. See Blake over there,” Jasmin looked to where a group where locked in a heated discussion in the large board room. “They are deciding what to do. Houston is involved and NASA, and the military, and everyone, really.” “Hold on! This is my discovery!” Jasmin shouted. Why had they left her sleeping? She had spotted the aliens first. Now they had landed, and she had missed it.

The American Civil War had ended, and the members of the American Gun Club tried to think of something else to interest them. At last they came up with the extraordinary idea of building the greatest cannon the world had ever seen and using it to launch a man-made "bullet" to the moon!

Los lectores principiantes aprenderán sobre los patrones básicos del Sol y la Tierra y lo que causa día y noche.

Why is there winter in the Southern Hemisphere at the same time there is summer in the Northern Hemisphere? Here is an explanation of how the position of Earth in relation to the sun causes seasons and the wonders that come with each one of them. Summer. Autumn. Winter. Spring comes again. Year after year, the seasons repeat themselves.

Young listeners will learn about the basic patterns of the sun and earth and what causes day and night.

When radio telescope operators Lauren Stelleck, a woman with a special gift enabling her to literally see certain sounds, and Steve Andrews, a diehard sci-fi geek, detect a signal like no other at Jodrell Bank in England, a chain of events is unleashed that propels Earth towards all-out nuclear war. Can Lauren and Steve unlock the secret of the signal before our species tears itself apart?

In the early days of civilization, we knew nothing about the moon. It was considered as a god chasing the sun in an endless race through the sky. Today, we know much more than our ancestors. We can speculate on the creation of the moon and what the Earth would be without the moon. It turns out that our moon has played a much more important role in life development than anyone would have thought.