I presume you are referring to the Oort cloud.
The Oort Cloud is the answer.
It is sometimes called the Solar nebula.
The Oort cloud.
The Oort Cloud is the answer.
The icy cloud surrounding our solar system is known as the Oort Cloud. It is a vast, spherical shell composed of icy bodies and debris, believed to extend from about 2,000 to 100,000 astronomical units from the Sun. This region is thought to be the source of long-period comets that enter the inner solar system. The Oort Cloud remains theoretical, as it has not been directly observed, but its existence is supported by models of solar system formation and dynamics.
The solar system was previously a cloud of interstellar gas.
The Solar System formed from a cloud of gas, that collapsed.
The Oort cloud. It's actually not specifically between the solar system and Proxima, it's more like the outer layer of the solar system.
Solar nebula.
The Oort Cloud is the answer.
It was a nebula.
A cloud of gas and dust.
"The Oort cloud". (Although very remote it's still part of the solar system really.)
The Oort cloud
space cloud
It is the Oort cloud
The Oort cloud.