Yes, Amavasya and New Moon are essentially the same phenomenon. In Hindu calendar and Indian astrology, Amavasya refers to the lunar phase of the "new moon." The term "Amavasya" is derived from the Sanskrit words "ama" (meaning "together" or "no") and "vasya" (meaning "dwelling" or "residing"). Therefore, Amavasya signifies the absence or non-existence of the moon.
During Amavasya, the moon is not visible in the sky because it is positioned between the Earth and the Sun, with the unilluminated side of the moon facing Earth. This results in a dark or invisible moon, and it marks the beginning of a new lunar month in the Hindu calendar.
Amavasya holds religious and astrological significance in many cultures, particularly in Hinduism. It is considered an auspicious day for performing various rituals, prayers, and ceremonies. On this day, people often observe fasting, engage in spiritual practices, and pay homage to their ancestors.
So, in summary, Amavasya and New Moon are different terms used to describe the same lunar phase when the moon appears invisible in the night sky.