Surprisingly, some Dyson spheres and ringworlds can be stable
In the realm of science fiction, Dyson spheres and ringworlds have been staples for decades. But it is well known that the ...
Astronomy23h
Inside radioisotope generators, the ‘nuclear batteries’ that power faraway spacecraft
How do we power missions in the outer reaches of our solar system and beyond? The solution, developed in the '60s, can last ...