The astrolabe was an ancient astronomical instrument that was used to determine the position of the sun, moon, planets, and stars. Today, we use a variety of instruments to make similar measurements, including telescopes, spectroscopes, and radio telescopes.

* Telescopes are optical instruments that allow us to see objects that are far away. They are used to observe the sun, moon, planets, stars, and other celestial objects.

* Spectroscopes are instruments that measure the wavelength of light emitted by objects. They are used to determine the composition of stars and other celestial objects.

* Radio telescopes are telescopes that receive radio waves from space. They are used to observe objects that emit radio waves, such as stars, galaxies, and quasars.

These instruments are much more powerful and precise than the astrolabe, and they allow us to make observations that were not possible in the past.