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.
Telescopes are used for observing stars.
Astronomy, from the greek astra, meaning stars.
Scientista started to gather information by observing the stars and learnt from here. First they used parallax to get the distance, then the apparent brightness, but after a while they can get luminosity, size/mass, what fuel they use (eg.helium), and then from that the learnt about the starts lifetime. Hope this is helpful
By observing stars and nature, as we do today.
By observing the stars.
By observing the characteristics of the sun, you can learn about its temperature, size, composition, and activity levels, which can give insight into its life cycle and behavior. Studying the sun can also provide information about solar weather patterns and their impact on Earth.
It means that you're observing them through a turbulent atmosphere.
A telescope is commonly used for observing stars. Telescopes collect and magnify light from celestial bodies, allowing astronomers to study stars in more detail. They come in various sizes and configurations, including optical and radio telescopes.
An observatory is a location used for observing terrestrial and/or celestial events
the color of the stars is realetedto its
Babylonians
You must say what objects that are being observed: stars, microbes, ants.