A steep-sided mass of viscous (doughy) lava extruded from a volcanic vent, often circular in plane view and spiny, rounded, or flat on top Its surface is often rough and blocky as a result of fragmentation of the cooler, outer crust during growth of the dome
a hemispherical roof a stadium that has a roof a concave shape whose distinguishing characteristic is that the concavity faces downward
The shelter housing a telescope The dome roof has a motorized slit that opens and can rotate 360 degrees to expose any portion of the sky We use Ash Domes for our large telescopes, and a specially constructed dome of our own design for the robotic telescope
The most difficult architectural form to construct, the dome is designed by rotating the arch 360 deg around its central vertical axis The result is a semi-spherical cap that rests upon a cylinder or the top of a pendentive