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Antimatter gravity measurement pertains to testing whether or not antimatter is subject to gravity in the same way as typical matter. A current and prevalent hypothesis, based on Einstein's equivalence principle, states that gravity affects 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 gravitational effects on antimatter are actually unknown. Direct experiments are needed. Recycling atoms and antimatter interferometry using antimatter hydrogen atoms is a proposed solution.〔 〕〔 〕〔 〕〔 〕 == Experiments == * ALPHA is studying tapped antihydrogen * ATRAP is developing techniques for cold antihydrogen * AEGIS proposes to diffract antihydrogen 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Antimatter gravity measurement」の詳細全文を読む スポンサード リンク
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