1
vote
0answers
32 views

The magnitude of spacecraft anomalous velocities?

That Voyager and several other spacecraft have had anomalous changes in speed is known. According to the news reports, the differences are unsettling. But just how large are these anomalies really? ...
1
vote
1answer
140 views

How do they point a camera on a space probe?

When a probe like Voyager 1 is sent into deep space they are able to point the camera at the planet and its moons and take pictures. How is the camera pointed at the object? Is the camera fixed to ...
11
votes
2answers
87 views

How are interplanetary trajectories found?

How are interplanetary trajectories that involve gravity assist maneuvers found? Examples: the MESSENGER spacecraft made flybys of Earth, Venus, and Mercury before getting into orbit the Juno ...
23
votes
8answers
4k views

Why don't modern spacecraft use nuclear power?

The Voyager 1 & 2 spacecraft launched in 1977 with Plutonium as their source of electricity. 34 years later they claim these two spacecraft have enough power to last them until at least 2020. That ...