Why did the Europeans undertake sea voyages?

The important reasons for undertaking sea voyages by Europeans were:

1. The Renaissance spirit led to the revival of the interest in geography and explorations. Many explorers set out to find new sea routes.
2. Increased demand for asian goods in European countries like spices, textiles, indigo etc.
3. The interest shown by Europeans to learn from the advanced Asian civilisations.
4. The closure of traditional route to the East by the capture of Constantinople by the Turks.
5. The invention of mariner's compass, the astrolabe and the quadrant.