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We've accounted for 95 percent of all the stars in the Milky Way. The other 5 percent are big, bright stars - the kind that dominate the night sky, but are lamentably both rare and short-lived. If biology's your thing, you can forget those guys.

I'm not such a big star. I am just a little planet. In Spain, people don't put so much attention on the star system. But here in America, I can feel it. Mostly, people are very, very nice. But there are also a bunch of fanatics behind the stars.

Do not look at stars as bright spots only. Try to take in the vastness of the universe.

I think we have to act like stars because it is expected of us. So we drive our big cars and live in our smart houses.

With every inch of land on Earth now catalogued by our satellites, the stars are the next place we as a species must travel. And with a booming world population that will hit 9.1 billion in 2050, large-scale space travel may become a necessity.

There are at least as many galaxies in our observable universe as there are stars in our galaxy.

Every star has that certain something that stands out and compels us to notice them.

It is that range of biodiversity that we must care for - the whole thing - rather than just one or two stars.

The bottom line is, like, one in five stars has at least one planet where life might spring up. That's a fantastically large percentage. That means in our galaxy, there's on the order of tens of billions of Earth-like worlds.

We live in a modest system, a galaxy called the Milky Way. If we named every star in the Milky Way and put them in the Hollywood telephone directory and stacked those telephone directories up, we'd have a pile of telephone directories 70 miles high.