We know how the universe began. An event we call the Big Bang started it all about 13.8 billion years ago. How the universe ...

The known universe is full of shockingly huge things. Here are the largest planets, stars, galaxies, and structures we've ...

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

The universe is approaching the midpoint of its 33-billion-year lifespan, a Cornell physicist calculates with new data from ...

The mass of the entire universe can also be estimated by measuring how the expansion rate has changed since the Big Bang. Normal matter and dark matter have acted to decelerate cosmic expansion, while ...

Scientists propose that gravitational waves shaped the universe. Their model challenges inflation theory. How exactly did the ...

According to data from the Hubble and James Webb Space Telescopes, the origins of the free-flying photons in the early cosmic ...

Astronomers have long thought the universe should look generally the same in every direction, but an anomaly in the radiation ...

“The cosmos is also within us, we're made of star-stuff. We are a way for the cosmos to know itself.” - Carl Sagan Compared to the Sun, how big is the Earth? What is a scale model and how does it help ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

George Fitzgerald Smoot III, whose experiments about space provided some of the most convincing evidence that the universe ...