You can create a multiple-value [field collection][1] field.

In the "field collection item" entity type, you can create the fields for the image and body text.

Afaik, the built-in image field type does not really work with external images. This problem is discussed here: http://drupal.stackexchange.com/questions/31416/linking-image-field-to-an-external-url


  [1]: http://drupal.org/project/field_collection