16
votes
4answers
858 views

How would we see a near-lightspeed object emitting light?

Consider an object travelling near the speed of light relative to us (let it be a spaceship or a star), which is emitting light (consider it monochromatic resulting from a two level electronic ...
1
vote
0answers
78 views

Plasma Propulsion system - Maximum Velocity [closed]

What is the maximum velocity that can be achieved using plasma propulsion if we could make a propulsion system as powerful as lightning ?
6
votes
6answers
3k views

How close can spaceship get to the Sun

If you want to fly a spaceship with human passengers as close to the Sun as possible, then what effects would the spaceship have to be designed to counteract in order to keep the passengers alive and ...