その結果、火星の1年（約1.88地球年）を通じて、時計の進み方に1日あたり最大で226マイクロ秒もの変動が生じるという。さらに、地球と火星の位置関係が変わる約15.8年の周期で、時計のずれ幅そのものが1日あたり約40マイクロ秒の範囲で変動することもわ ...

Einstein's theory of general relativity, published in 1916, built upon his earlier work, including special relativity and the mass-energy equivalence, both published in his "Annus Mirabilis" in 1905.

Why can't anything travel faster than the speed of light? Do black holes really suck? And why is the universe expanding? These are just a few of the questions author and astrophysicist Jeffrey Bennett ...

remove-circle Internet Archive's in-browser audio with external links "theater" requires JavaScript to be enabled. It appears your browser does not have it turned on ...

A century ago, physicist Albert Einstein unveiled a theory that would change the world — general relativity. It would cement his place at the top of the pantheon of scientific minds, and see him ...

On 25 November 1915, Albert Einstein presented his general theory of relativity at the Prussian Academy of Sciences. This theory is still considered to be the most important idea in modern physics. It ...

3D-printed rocket startup Relativity Space has closed $500 million in Series D funding (making official the earlier reported raise), the company announced today. This funding was led by Tiger Global ...

We've all heard of relativity, but what is it? How does it relate to light and motion? So we've all heard of relativity, right? But... what is relativity? And how does it relate to light? And motion?