The Sun is a main-sequence star of spectral class G2V, unofficially categorised as a “yellow dwarf” star.
Warning: you should never look directly at the Sun, even through sunglasses, as this can result in permanent damage to your eyes! Specially designed eclipse glasses must be worn to observe solar eclipses.
The Sun can be observed safely, however, by carefully projecting the image from a telescope or binoculars onto a piece of white paper or card. Never be tempted to look directly through the telescope or binoculars, while doing so, however, as this could result in instant and permanent blindness.
Even projecting the Sun’s image through a small telescope, or binoculars, will reveal any large sunspots which may be present.
Alternatively, special solar filters are available, although these should always be designed specifically for the model of telescope you are using.