space exploration

Garwin on Serendipity and Solar Sailing

In July, the Planetary Society’s Lightsail 2 spacecraft demonstrated the viability of “solar sailing,” becoming “the first spacecraft in Earth orbit propelled solely by sunlight.” But…

Read more

Wanted: Astronomer with Top Secret Clearance

NASA’s orbiting James Webb Space Telescope will be “the premier observatory of the next decade, serving thousands of astronomers worldwide, and studying every phase in the history of our…

Read more

Where does the plutonium come from?

Last week I wrote about how the shortage of Pu-238 might impact the exploration of the outer Solar System, but I didn’t much get into where the plutonium comes from. After all, while there are trace amounts of natural plutonium, there certainly isn’t nearly enough to fuel a space probe. So this week it seemed […] The post Where does the plutonium come from? appears on ScienceWonk, FAS's blog for opinions from guest experts and leaders.

Read more