The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, ...

This means that it would still take a little over four whole years of traveling at lightspeed to reach the red dwarf—not that ...

Our Solar System orbits the galactic center at an estimated 792,000 kilometers per hour, taking 225 million Earth years to ...

A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

Nicolaus Copernicus was a Renaissance polymath and astronomer. In the years 1508 to 1514, he formulated a model of the Universe that had the Sun at the center with Earth and other planets orbiting ...

The search for the universe’s center starts with a simple intuition: if everything exploded outward in the Big Bang, there must be a point it all came from. Modern cosmology turns that intuition ...

The Euclid telescope launched in 2023, hitching a ride on SpaceX's Falcon 9 to study the cosmos from the Sun-Earth Lagrange point 2, 1.5 million kilometers (932,000 miles) from Earth. Its job is a big ...

This video shows the habitable zone around the star HD 20794 (in green) and the trajectory of the three planets in the system. Thirty years after the discovery of the first exoplanet, we detected more ...

In 2002, two astronomers analyzing data from more than 200,000 galaxies decided to answer a question nobody asked: if you could trap all the light in the universe (from the perspective of someone on ...