Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...
A giant planet circling a nearby star has given astronomers a rare look at what a colder, more Jupiter-like world can be like ...
Interstellar Comet 3I/ATLAS reveals a frozen origin older than the Sun, offering new clues about early planetary system ...
A star's mass determines its entire life story, from how it shines to how it dies. For young stars shrouded in dust, getting ...
A newly analyzed planetary system spotted by NASA’s TESS mission is challenging long-standing assumptions about how planets ...
By studying galaxy clusters separated by hundreds of millions of light-years, Penn physicist Patricio Gallardo and ...