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Solar calendar

A solar calendar is a calendar whose dates indicate the position of Earth on its revolution around the Sun or, equivalently, the apparent position of the sun moving on the celestial sphere.

Lunar calendar

A lunar calendar is a calendar that is based on cycles of the lunar phases. Because there are slightly more than twelve lunations (synodic months) in a solar year, the period of 12 lunar months (354.37 days) is sometimes referred to as a lunar year.

Lunisolar calendar

A lunisolar calendar is a calendar in many cultures whose date indicates both the moon phase and the time of the solar year.

If the solar year is defined as a tropical year, then a lunisolar calendar will give an indication of the season; if it is taken as a sidereal year, then the calendar will predict the constellation near which the full moon may occur.

How to use Mind maps?

  1. Use Mind maps to read the topics faster with a complete topic coverage.
  2. Try to write sentences or paragraphs using Mind maps. This will help you to write better in your Mains examination. It also aids in engraving the topic better in your mind.
  3. Use them as flash cards to revise topics.
  4. Download the images into your devices to study in your leisure times or while travelling.
  5. Use Mind maps to read and revise faster during last minute preparations.

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