User:Steve Quinn/Antimatter gravity measurement

Antimatter gravity measurement pertains to testing whether or not antimatter experiences gravity exactly the same as normal everyday matter present in daily life. A current and prevalent hypothesis, based on Einstein's equivalence principle, states that gravity effects matter and antimatter exactly the same. Yet, there is no direct evidence to support this hypothesis.

Additionally, the hypothesis of dark matter and dark energy means that 95% of the mass of the observable universe cannot currently be detected; and can only be inferred from calculations and observable indirect effects. Therefore, researchers are unable to account for 95% of the universe's gravity. This means that gravity effects on antimatter are actually unknown. Direct experiments are needed. Antimatter interferometry using antimatter hydrogen atoms is a proposed solution.