Yes, the nuclear membrane, also known as the nuclear envelope, consists of two phospholipid bilayers.

Here's a breakdown:

* Inner membrane: Directly faces the nucleoplasm (the fluid inside the nucleus).

* Outer membrane: Continuous with the endoplasmic reticulum (ER) and often has ribosomes attached to it.

These two membranes are separated by a space called the perinuclear space, which is typically around 20-40 nanometers wide.

The nuclear membrane plays a crucial role in protecting the DNA within the nucleus and regulating the transport of molecules between the nucleus and the cytoplasm.