Our reflective foil insulation stops 97% of radiant heat penetration and loss. Plus, you get a ventilated attic because our soffit and ridge cap are vented, giving you continuous air flow through your attic. You can put as much conventional insulation in your attic as you like.
There are spiral galaxies with numerous, ragged spiral arms in their disks (called ``flocculent'' spirals), so perhaps the self-propagating star formation mechanism is responsible for the flocculent spirals. A ``grand-design''spiral seen face-on. A flocculent spiral with ragged spiral arms.
A spiral galaxy with the following properties: (Block, Puerari, Stockton, & Ferreira, 2000) Circular, i.e. not a stretched oval shape. âGrand designâ, i.e. the arms are clearly delineated. Relatively empty space in the middle. Halo of stars around middle space. Four arms, which is actually quite rare.