This map was made possible by Zhang and Green's ... for regions with a higher dust density. "Higher density," of course, is—in this case—still very little. Approximately ten billionths of ...

This map was made possible by Zhang and Green's ... for regions with a higher dust density. "Higher density," of course, is in this case still very little: approximately ten billionth billionth ...

This map was made possible by Zhang and Green’s measurement ... curve should become flatter (less dependent on wavelength) for regions with a higher dust density. “Higher density,” of course, is in ...

This map was made possible by Zhang and Green ... for regions with a higher dust density. “Higher density,” of course, is in this case still very little: approximately ten billionth billionth ...