Complex sentence: The Double Helix Nebula is a gaseous nebula near the center of our galaxy, which is thought to have been distorted by magnetic torsion into the shape of two connected spirals, known popularly as a double helix, akin to the shape of DNA.
Split into simpler sentences: The Double Helix Nebula is a gaseous nebula near the center of our galaxy. It is thought to have been distorted by magnetic torsion into the shape of two connected spirals, known popularly as a double helix, akin to the shape of DNA.