Though tiny, this newfound satellite galaxy around M31 offers big lessons — and questions — about how galaxies evolve.

The Milky Way is one of the biggest in the observable universe: Even if you traveled at the speed of light, it would take 100,000 years to go from one end of our home galaxy to the other.

When we observe distant celestial objects, there is a possible catch: Is that star I am observing really as reddish as it ...

When I get stressed, I look into the night sky and allow my mind to roam the infinity of space and time. It helps to get your ...

Answer: For near stars, astronomers use a method called parallax. During Earth’s orbit, near stars seem to shift their position against the farther stars. This is called parallax shift. By ...

Exploding stars known as supernovas may have sparked mass extinctions that wiped out up to 85% of animals on Earth.

There have been many claims of exoplanets orbiting Barnard's Star over the years, dating all the way back ... in the galaxy and make up the majority of the closest stars to us. Second, their ...

A supercluster is usually composed of hundreds or even thousands of clusters of galaxies, and these clusters are ...

Douglas Adams, The Hitchhiker's Guide to the Galaxy Humans have many strengths ... seek to map the three-dimensional structure of the Milky Way and even the visible Universe.

Swirling through the Milky Way's central zone, in the turbulent region surrounding the supermassive black hole at the core of ...