Neutron star and black hole masses in binary systems are calculable using Kepler's laws of motion, based on orbital parameters and object speeds. Merging neutron stars or black holes emit ...

Astronomers have found that a planet discovered earlier this year is, in many ways, Earth’s twin. It’s the smallest exoplanets yet found for which we’ve been able to measure both its size and density.

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The Christian Science Church, and we’ve always been transparent about that. The Church publishes the Monitor ...