Recent content by dancingstar

How long would it take to travel to Mars?

Interesting link, Thank you . What fascinates me as well is the visibility of the satellites moving across the night sky at speed, and are visible to the naked eye , they must be a tremendous distance away. How high are they and do they come close to each other?

Is there a radiation belt on other planets? like the Van Allen Belt?

As far as space stations are concerned, given that it is in a certain fixed orbit in the Earths gravitational field , it is quite easy then to calculate its distance, but could you please give me a rough estimate of their distance from Earth.