> with Earth providing an extra sunshield Maybe it needs the sun for its solar power? > And "an unimpeded view" of what? If hubble is looking at sometihng no

> with Earth providing an extra sunshield Maybe it needs the sun for its solar power? > And "an unimpeded view" of what? If hubble is looking at sometihng not perpendicular to its orbit, during half the 90 minutes the target will be "behind" the earth, right? So it can only look at things that are to the left or right of its orbit.