He envied the early space explorers, who had put their lives on the line.

Of course, he was aware that very odd Life forms had been found by the early space explorers.

By the end, the children will be thorough space explorers, all without leaving the planet.

Scientists and space explorers now are looking for a way to communicate almost instantly beyond Earth.

His private fortune was large enough to fund the construction of a personal spacecraft, and he became a space explorer.

Where would a space explorer find water and oxygen?

Within office buildings, space explorers usually find most of their treasures buried near the top or the bottom.

He is the world's first private space explorer who launched to space twice.

We look to the space explorers as our heroes.

"Didn't your early space explorers tell the same story?"