In the diagram above, adapted from Newton’s diagram in his 1687 Philosophiae Naturalis Principia Mathematica, we see the effect of gravitation on a comet that was visible between 1680 and 1681 ...

This is a schematic of a solar-powered electrolysis cell which converts carbon dioxide into hydrocarbon and oxygenate products with an efficiency far higher than natural photosynthesis. Power ...

The scientists built the tandem cell with a bottom silicon heterojunction device and a 19.73%-efficient top inverted perovskite solar cell with an energy bandgap of 1.71 eV integrating the ICLs.