Earth’s gravitational force, g, has been known for centuries. But the exact value of G, the universal gravitational constant, ...

By studying galaxy clusters separated by hundreds of millions of light-years, Penn physicist Patricio Gallardo and ...

Penn physicist Patricio Gallardo and collaborators tracked the speeds of distant galaxy clusters to test the strength of gravity across hundreds of millions of light-years. The verdict? Gravity neatly ...

A spectacular cosmic event nicknamed “SN Winny” could help solve one of astronomy’s biggest mysteries: how fast the universe is expanding. This rare superluminous supernova, located 10 billion ...

Jane Street's compensation more than doubled as its trading haul outpaced major Wall Street banks and market-making peers.

A closer look at the Air Force's 'spin proof' fifth-generation fighter.

The grammar of war is changing. We are entering an era where algorithms, not the sound of artillery, determine victory or ...

A star's mass determines its entire life story, from how it shines to how it dies. For young stars shrouded in dust, getting ...

By peering deep inside Orion's star-forming gas clouds, radio astronomers have been able to directly measure the masses of ...

Radio measurements are revealing the true masses of young stars hidden in dust, helping explain how a star's mass shapes its ...