Not everyone can be an astronaut and go into space, some people with sufficient resources can purchase and fly sub-orbitally thanks to various companies and for more money (considerably) fly into orbit.

I was saddened to learn of the passing of Leonard Nimoy, a fellow space traveler because he helped make the journey into the final frontier accessible to us all.... Indeed, there are strange new worlds to explore -- to seek out new life and start new civilizations. It is time to boldly go where no man -- or woman -- has gone before. Thanks to Leonard Nimoy and his beloved Mr. Spock, the bar has been set high for us to continue humanity's quest to probe outward in the universe.

Astronauts are not superhuman. They lead ordinary lives and have varied personalities.

Computers allow us to squeeze the most out of everything, whether it's Google looking up things, so I guess that tends to make us a little lazy about reading books and doing things the hard way to understand how those things work.

Just as Mars - a desert planet - gives us insights into global climate change on Earth, the promise awaits for bringing back to life portions of the Red Planet through the application of Earth Science to its similar chemistry, possibly reawakening its life-bearing potential.

When you're in a spacecraft, you need to know what things you can touch and what things you shouldn't touch!

I suggest that going to Mars means permanence on the planet - a mission by which we are building up a confidence level to become a two-planet species.