sentences:  Aryabhatta was the first to prepare the Indian Almanac, better known as panchangam.Rural amateur astronomers still use the panchang, while some assist the pandits in drafting the annual almanac.Indian amateur astronomers use maps that, depending on experience and intentions, may range from simple planispheres through detailed maps of very specific areas of the night sky for getting involved in projects like photographing the whole sky, the Messier objects or observing the occultation of the stars by the Moon, or studying asteroids.