An engineer who works for NASA has put forward a proposal for a new way to travel through interstellar space—a “helical engine” that could, potentially, push a spacecraft forward without the need for any propellant at all. David Burns, from NASA”s Marshall Space Flight Center, presented his idea on the space agency”s Technical Reports Server,
What happens if a spacecraft encounters problems in the vacuum of space? While space travel can be very dangerous, there are plenty of fail-safes. NASA, in fact, is carrying out tests to make sure the Orion spacecraft is ready to safely carry crew on an alternate mission profile in the unlikely event that problems occur.
LightSail 2 has successfully deployed its solar sails. Shortly after 12:00 pm PST (19:00 UTC) The Planetary Society tweeted that the sails were deployed, and that the spacecraft was sailing with sunlight. We can all enjoy their success and start to wonder how solar sails will fit into humanity”s plans for space exploration. This is