Feb. 1, 2003: At the dawn of the space age some 40 years ago, we always knew who was orbiting Earth or flying to the Moon. Neil Armstrong, Yuri Gagarin, John Glenn. They were household names--everywhere.

Lately it’s different. Space flight has become more “routine.” Another flight of the shuttle. Another visit to the space station. Who’s onboard this time? Unless you’re a NASA employee or a serious space enthusiast, you might not know.

Dave Brown. Rick Husband. William McCool. Michael Anderson. Kalpana Chawla. Laural Clark. Ilan Ramon.

Now we know. Those are the names of the seven astronauts who were tragically lost on Saturday, Feb. 1st, when the space shuttle Columbia (STS-107) broke apart over Texas.

Before today, perhaps, they were strangers to you. But if that's so, why do you have a knot in your gut? What are those tears all about? Why do you feel so deep-down sad for seven strangers?

Astronauts have an unaccountable hold on us. They are explorers. Curious, humorous, serious, daring, careful. Where they go, they go in peace. Every kid wants to be one. Astronauts are the essence of humanity--the best parts.

They are not strangers. They are us.

Dave Brown asked yesterday, jokingly, “Do we really have to come back?”

No. But we wish you had.

SpaceWeather.com and its readers extend heartfelt sympathy to the family, friends and colleagues of the STS-107 crew.