Astronomy
Astronomers.
astronomers
No, a physicist studies motion, energy and similar things. An astronomer studies objects in space, though not necessarily the physics of those objects. People who study the physics of objects in space are called astrophysicists.
astronomers
<p>Astronomy or Astrophysics depending on which objects... large or small.<p>
gravity
Space Studies Institute was created in 1977.
Objects in Space was created on 2002-12-13.
Because they are closer to the objects.
Is your question "what do you weigh different objects on in space...", or "why would you attempt to weigh an object in space"...?
they use light-years to determine the space between objects in space