This NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the Squid Galaxy. Everything on Earth, in our solar system, our galaxy, and beyond is contained within ...

Positive curvature, like that on a sphere, implies a finite universe, while zero curvature, as on a flat plane or negative ...

This video explores the question of why the sky is dark, examining key concepts such as the infinite nature of the Universe and Olber’s Paradox. Chapters: 00:00 Introduction 00:53 Why is the sky dark?

But there are several important anomalies, including a widely debated one called the Hubble tension. It is named after Edwin ...

Doesn’t seem like much of a brainteaser, does it? Everyone knows the sky darkens at night because the sun sets … or more accurately, because our part of planet Earth rotates away from the sun, and ...

Cosmologists are increasingly entertaining a radical possibility: that the cosmos might fold back on itself so that, on the ...

Although it has ancient roots, the meaning of infinity remains baffling, and it seems to have absolutely no bearing on everyday life. The mathematics of infinity is complex, but it isn’t simply a very ...