Telescope,microscope,
telescopes
Magnifying glass, telescope, microscope, television etc.
teleschope and a engredeance
Astronauts use a variety of tools while in space. For instance, astronauts use specially designed tools, like hammers and wrenches, that are made to be used with unwieldy space suits.
Because there are not only things we cannot see but there is in infinite amount of objects in space we can not get to or physically explore (even with robots). The fact is, that these objects are to far away thus hindering our ability to completely understand them or where things in space came from. So yes a telescope, space shuttle and rovers can allow us to explore things that our relatively close but we have nothing that enables us to explore the universe and understand in precisely.
telescopes
Magnifying glass, telescope, microscope, television etc.
Scientists use microscopes to observe and study tiny structures at a magnified level. Telescopes, on the other hand, are used to observe distant celestial objects in space.
probably a microscope or magnifying glass.
You would observe the length of objects.
teleschope and a engredeance
The first cosmologists used telescopes as well as the naked eye to observe the universe. The astrolabe was measured a star's altitude and observatories were built to help with observations. Other tools included armillary spheres and the quadrant.
A microscope.
they use light-years to determine the space between objects in space
You put it on a scale
Tools or their hands.
Use a telescope.