Windows to the Universe

This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan.
(Jeff Hester (Arizona State University) and NASA)

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This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan. (Jeff Hester (Arizona State University) and NASA)

This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan. (Jeff Hester (Arizona State University) and NASA)

This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan. (Jeff Hester (Arizona State University) and NASA)

This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan.
(Jeff Hester (Arizona State University) and NASA)

This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan.
(Jeff Hester (Arizona State University) and NASA)

This image shows a small portion of a nebula called the "Cygnus Loop." This supernova remnant lies 2,500 light-years away in the constellation Cygnus the Swan.
(Jeff Hester (Arizona State University) and NASA)