SUBSIM Radio Room Forums - New Project Plans To Send A Spacecraft To Alpha Centauri In 20 Years

SUBSIM Radio Room Forums (https://www.subsim.com/radioroom/index.php)

- General Topics (https://www.subsim.com/radioroom/forumdisplay.php?f=175)

- - New Project Plans To Send A Spacecraft To Alpha Centauri In 20 Years (https://www.subsim.com/radioroom/showthread.php?t=225592)

Quote:

Originally Posted by Neal Stevens (Post 2397212)

You still in your old house?

That's about the only good thing about moving, you find a lot of stuff you forgot you ever had...

For the moment, latest ETD is sometime at the end of this month/beginning of next month. :yep:

Quote:

Originally Posted by Rockin Robbins (Post 2397156)

I think a simple calculation will show that if you could get the craft to Alpha Centauri you would never be able to learn that it arrived. You'll never generate the power for a receivable signal from a small circuit board. If you could generate 1 watt that would be amazing. However our most dense storage devices, Lithium based batteries are good for 3 years before they quickly degrade to uselessness. If you build a craft so small you would only have enough space for about a 300mAh battery. At a 10C discharge, that's 3 amps for 6 minutes then kaput. And that's if it would retain 100% of its capacity, which it wouldn't.

I may be optimistic. The camera might take up the space that I figured for the battery. I bet this thing would have a 30% chance of detection from the moon.

I guess most of you know the story behind the struggle NASA had to send the first man to the Moon and the bonus they got from the development.

I could very well see some new "bonus" in future space travel and in our daily life-such as new kind of battery, cameras a.s.o

Markus

David Brin's 2012 book Existance uses these laser propelled solar sails in an interesting slant. Not only do they get a big push from the laser on the way out, but they use the sail as a brake when approaching a star system.

The power available to transmit images could be supplied by the sail if it also worked as a collector and twenty years in electronics development will bring some amazing changes.

I'm OK with it and I'm happy they're choosing a spacecraft. Watercraft just don't cut it. :88)