Jantar Mantar is an ancient astronomical observatory located in Jaipur, India. It was built by Maharaja Jai Singh II in the 18th century.

The primary purpose of an astronomical observatory is to observe celestial objects such as stars, planets, and galaxies.

Telescopes are commonly used in astronomical observatories to magnify distant objects and collect light from them.

Jantar Mantar is an ancient astronomical observatory located in Delhi, India. It was built by Maharaja Jai Singh II in the 18th century.

Jantar Mantar is known for its large collection of astronomical instruments, including sundials, astrolabes, and quadrants.

Man Mandir is an ancient astronomical observatory located in Varanasi, India. It was built by Maharaja Man Singh I in the 16th century.

Jantar Mantar is an ancient astronomical observatory located in Jaipur, India. It was built by Maharaja Jai Singh II in the 18th century.

Vedhshala is an ancient astronomical observatory located in Ujjain, India. It was built by Maharaja Jai Singh II in the 18th century.

The Royal Greenwich Observatory is known for its contributions to the study of celestial mechanics, including the development of the Greenwich Mean Time (GMT).

Vedhshala is an ancient astronomical observatory located in Mathura, India. It was built by Maharaja Jai Singh II in the 18th century.

Jantar Mantar is an ancient astronomical observatory located in Delhi, India. It was built by Maharaja Jai Singh II in the 18th century.

Man Mandir is an ancient astronomical observatory located in Varanasi, India. It was built by Maharaja Man Singh I in the 16th century.

The Yerkes Observatory is known for its contributions to the study of astrophysics, including the discovery of the first extrasolar planet.

Vedhshala is an ancient astronomical observatory located in Ujjain, India. It was built by Maharaja Jai Singh II in the 18th century.

Kitt Peak National Observatory is located in Arizona, USA. It is known for its contributions to the study of solar astronomy.