According to Jain cosmology, there are multiple suns and moons in the universe. Jain scriptures describe the universe (loka) as having numerous continents (dvīpas) and oceans, each with its own sun and moon.

Specifically, Jain texts state that there are two suns and two moons in each half of the universe (Urdhva Loka and Madhya Loka), but they appear as one to the inhabitants of any given continent because they move in such a way that only one is visible at a time. In total, the Jain cosmological model refers to 15 suns and 15 moons in the entire universe, corresponding to the various continents and regions.

References:

• "Jainism: The World of Conquerors" by Natubhai Shah
• "The Jaina Path of Purification" by Padmanabh S. Jaini

In summary: According to Jainism, there are 15 suns and 15 moons in the universe.