Navagrahas represent the nine celestial bodies , and their names are given below,
<p>Surya :  the Sun
Chandra : the Moon
Mangala : Mars
Budha : Mercury
Dev Guru : Jupiter
Shukra: Venus
Shani: Saturn
Rahu: Ascending (or north) Lunar node
Ketu: Descending (or south) Lunar node
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In the hindu tradition, navagraha pooja  is usually performed before entering a new house, this is nothing but invoking all nine bodies to bless the family , for a good start at the new home. This ritual is usually performed by the married couple, as the chanting of the prayers is done by the priests. Nine celestial bodies are represented by nine coconuts placed  in nine small pots, along with betel leaves and flowers.These nine arrangements are called as ' Kalasas', in Indian Language.
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