Astronaut: What is it like to be an astronaut? How does it feel? What does it take to become an astronaut?

BIG: One of the most asked questions about the universe is “How big is it?” — and that’s one of the hardest to answer. This show tackles the question by taking the audience on an immersive journey to the far reaches of the universe. Travel through space and time at the speed of light to explore the planets, stars, and unbelievably distant galaxies.

Dawn of the Space Age: From Sputnik to the Space Shuttle and beyond, join the excitement of exploring the final frontier. Behold the drive, passion, and perseverance of the men and women who dare to explore, as the world celebrates the 50th anniversary of the first human in Earth orbit and the 30th anniversary of the first Space Shuttle launch.

Forces Of Nature: Get up close and personal to erupting volcanoes, devastating earthquakes, and powerful storms as scientists travel the world trying to understand what causes these dangerous natural events. Risking their lives for scientific discovery, these experts forge their way through volcanic flows, along treacherous fault lines, and in cars heading straight toward a raging twister. Forces of Nature is a National Geographic production.

Ice Worlds: You don't need a parka to explore the polar regions of Earth. Join us on a journey from the frigid waters of Antarctica to the frozen landscapes of distant worlds across our solar system.

Mars Update: What's up on Mars? Discoveries are coming from the red planet so quickly it can be difficult to keep up. We'll take you through a brief history of Mars exploration, then fill you in on the latest news and pictures from our robotic explorers. We'll even show you how to find Mars from your own back yard!

Natural Selection: Join young Charles Darwin on an adventurous voyage of exploration circumnavigating the globe on the HMS Beagle. Witness the thrill of scientific discovery by seeing the world through Darwin’s eyes. Make observations of the most beautiful natural scenery and let the pieces of the scientific puzzle slowly but surely fall into place. Allow Darwin himself to reveal the simple and beautiful mechanism that explains the origin of species: Natural Selection.

Nine Planets and Counting: How many planets are there? Nine? Eight? Ten? Twelve? The answer may surprise you.

One World, One Sky: Big Bird's Adventure: Based on the popular children's show Sesame Street, Big Bird, Elmo and their friend from China, Hu Hu Zhu, take viewers on a journey of discovery to learn about the Big Dipper, the North Star, the Sun and the Moon.

Our Place In Space: While solving a crossword puzzle about the sky, endangered animals explore the cause of day and night, the importance of our star the Sun, the beauty of the constellations, and the variety of objects that make up the Universe.

Sea Monsters: Journey 80 million years back in time to an age when mighty dinosaurs dominated the land, and as equally astonishing assortment of ferocious creatures swarmed, hunted, and fought for survival beneath the vast, mysterious prehistoric seas.

SETI: The Search for Extra Terrestrial Intelligence: The prospect that we may not be alone in the universe is taken as a fact by the movies, writers and a great many scientists. As yet, we have no hard evidence of another living thing outside Planet Earth. S.E.T.I. - The Search for Extra Terrestrial Intelligence is a show that explores many sides of this topic, from the planets we are finding around other stars, to the feasibility of traveling to these stars. Will we make contact in our lifetimes?

Seven Wonders: Most people have heard of the seven wonders of the ancient world, but did they really exist? What were they used for, and what did they look like? Turn back the pages of time and witness these wonders as they may have appeared thousands of years ago. Then, experience seven wonders of the modern universe.

Skies Over Nashville: Sit back, relax, and watch the stars come out as we take you on a tour of the constellations, planets and other astronomical sights visible tonight. This is a great opportunity to ask questions or make requests.

Skywatchers of Africa: For thousands of years, Africans have used their knowledge of the sky to build their societies, shape their spiritual lives, and meet their physical needs for survival. Skywatchers of Africa highlights the diversity of African astronomy, examines cultural uses of the sky that developed over thousands of years, and celebrates our shared human experience.

STARS: Every star has a story. Some are as old as time, faint and almost forgotten. Others burn bright and end their lives in powerful explosions. New stars are created every day, born of vast clouds of gas and dust. Through every phase of their existence, stars release the energy that powers the universe. Journey to the furthest reaches of our galaxy and experience both the awesome beauty and destructive power of Stars.

Stars of the Pharaohs: Discover how ancient Egyptions studied the skies to tell time, create workable calendars, and align gigantic monuments. Explore the connection they felt with the stars and other astronomical phenomena.

Two Small Pieces of Glass: Four hundred years ago, Galileo was the first to use a simple telescope to explore the night sky. Trace the history of the telescope from Galileo's discoveries to the modern day, and take a brief tour of the current night sky.

We Are Astronomers: Do you know what an astronomer does? Todayis astronomer is not the lone observer of past centuries. We Are Astronomers reveals the global collaboration, technology and dedication required to answer the unresolved questions of the Universe.

Wonderful Sky: Rain or shine, day or night, the sky above is a wonderful sight. What can you see when you go outside and look up?