A telescope lets you see distant objects.
opthalmoscope- instrument to view the eye
an optometer
telescope
to gaze up at stars and record movement.
Telescope
Usually during the night.
Spectroscope. Very fun and interesting activity.
Depends what you mean by instrument but I guess the sun, mmon and stars are pretty good indicators to use.
telescopes
At the Age of Exploration they used telescope to observe stars.
A spectrometer is used to determine the composition of stars, and how fast they are going relative to Earth.
telescope
That is a telescope
to gaze up at stars and record movement.
Spectroscope
You use a telescope to observe stars, and sometimes also use a star map.
Telescope
Usually during the night.
Terrestrial telescope
An Astrolabe.