Project Orion’s 4,000-Ton Spacecraft Would Have Needed 800 Nuclear Explosions for Orbit
Eight hundred nuclear explosions were calculated to put one Project Orion spacecraft into Earth orbit. The proposed vehicle weighed 4,000…
spacecraft engineering
NASA Keeps Voyager Probes Working Despite Two-Day Command Cycles
NASA can still command Voyager 1 and Voyager 2 nearly five decades after their 1977 launches. What it cannot do…