Successes and failures of the Apollo program, which landed men on the moon.

Obstacles to overcome to put the first humans on Mars.

Emily explores how all the space debris orbiting Earth is tracked and managed.

Some of the most inhospitable and extreme places in the solar system; where to look for life on other planets.

Emily Calandrelli explores how people might travel through space in the future.

An Alabama facility manufactures rockets; NASA tests them before launch.

Exoplanets outside the solar system; discoveries of other worlds.

The case for space exploration: a change in perspective; economic benefits.

Emily Calandrelli explores some prominent disasters in the space race and looks at what was learned by each setback.

Amusement park rides can be like space travel.

People of all ages visit Space Camp to find out what it is like to train to be an astronaut.

Products made for the NASA space program now make life better for people on the ground.

The space program captures breathtaking and dramatic images in the solar system and in galaxies beyond.

Astronauts discuss why people explore outer space; the James Webb Space Telescope; a man wants to build a human settlement on Mars.

Deaths of massive stars cause supernovas, gamma ray bursts and black holes; tracking them aboard a 747.

The sun; two types of dangerous solar explosions; the world's largest solar farm.

Satellites of all sizes; how satellites are made and tested; the building of NASA's ICESat 2.

How rockets are made; how they blast off and make their way through the Earth's atmosphere; NASA's Wallops Flight Facility; preparing for the launch of the Antares Rocket; a propulsion system may be the key to one day traveling to Mars.

Outer space; companies planning to send tourists into space; Virgin Galactic; a two-week visit to the International Space Station and a return home orbiting the moon.

The moon; teams competing for the Google Lunar X Prize; returning to the moon.

Creating and testing high-altitude balloons to survive the rigors of near space; a balloon lifts an 8,000-pound telescope to the edge of space and discovers something amazing; a dramatic search-and-rescue mission.

2050 is still decades away, but what might the world be like in that year? What new technology will be available? Will robots be commonplace? Will space tourism thrive? "Xploration Earth 2050" investigates some of the questions. The host speaks with entrepreneurs whose businesses focus on futuristic ideas and products in automotive technology, consumer electronics and health care. Scientists, doctors and science-fiction writers also explore the questions posed. The show also looks at older sci-fi movies to see how many proposed ideas have come to fruition.

Philippe Cousteau Jr. is no stranger to exploration. The grandson of legendary underwater explorer Jacques Cousteau, Philippe hosts and serves as executive producer of this half-hour earth science series that examines the planet. He visits diamond and gold mines to see how gems and metals are formed, travels to active volcanoes to observe what happens inside the Earth's burning core, and checks out weather stations in mountainous areas to get an idea of how weather phenomena form in the atmosphere.

When people think of American space travel, the first names that come to their minds are usually the likes of Buzz Aldrin, Neil Armstrong and Sally Ride. Like with most massive projects like NASA's, there are a number of people behind the scenes who work tirelessly to get to the point where astronauts can go into space. Those people, however, aren't household names like the folks who blast off on the space shuttles. This series profiles the secret heroes, engineers who helped build the spacecraft and other instruments that have allowed astronauts to launch into space to explore the world beyond what's visible from Earth. The show reveals the stories behind how they created such machines as the Saturn V moon rocket and the Hubble Space Telescope.