Latest Ben R. Oppenheimer Stories
Next time you spy the Big Dipper, keep in mind that there is another star, invisible to the unaided eye, contributing to this constellation.
Scientists are one step closer to understanding how new planets form, thanks to research funded by the National Science Foundation (NSF) and carried out by a team of astrophysicists at the American Museum of Natural History.
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.