In Jain cosmology, Jambudwip is not the same as our modern Earth.

• It is the central continent of the Middle World (Madhyaloka) in the Jain universe.
• Bharat Kshetra, which is part of Jambudwip, is the region where human beings live.
• So, from Jain view, Jambudwip is within the universe, not outside it, but it is not a physical continent on today's scientific earth.

In short: Jambudwip is a cosmic realm in Jain geography, not our ordinary earth alone.