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spectrograph
You must say what objects that are being observed: stars, microbes, ants.
Telescopes are used for observing stars.
Astronology is the study of the moon, stars and other objects in space.
It is a number of astronomical objects which may be stars, galaxies or other large radiant objects.
Astronomy, from the greek astra, meaning stars.
The list - for this Answer - is quite lengthy: in fact everything that we know about Stars and all other celestial entities comes from the spectrums of the observed Light.
No. Stars are not fixed objects.
You Can Learn About The Stars
it would be easy if someone told me about this
Solar system
This study is called astronomy.