An observatory is a building specifically designed for studying the sky, stars, planets, and other objects in space. Most observatories have large telescopes mounted under rotating domes that open to give astronomers a clear view of the night sky. The dome protects the delicate equipment during the day and rotates to point in any direction when observations begin.

Observatories are usually built on mountaintops or in remote areas far from city lights, where the air is clearer and light pollution won't interfere with viewing faint stars and distant galaxies.

Some observatories focus on specific types of observation. Radio observatories use huge dish antennas to detect radio waves from space rather than visible light. Solar observatories study only the sun, using special filters to observe solar flares and sunspots safely.

Before modern observatories existed, ancient astronomers built stone structures like Stonehenge to track the sun's movement across seasons. Today's observatories continue that tradition with vastly more powerful technology, helping scientists discover new planets and explore what lies beyond our world.