Rarest Stars in the Universe: Stars come in many forms, but some types are so rare that only a handful exist in our galaxy. For example, O-type stars account for just 0.00003% of the stars near the ...

Galaxies like our Milky Way grew through cascading mergers of smaller galaxies that began billions of years ago. The ancient progenitors of galaxies like ours were small galaxies similar to modern-day ...

Scientists still don’t know where ghostly particles called neutrinos originate. A distant galaxy could be a potential source.

Early-type galaxies, encompassing both elliptical and lenticular systems, are characterised by smooth stellar light distributions and a predominance of random over ordered motions. Stellar kinematics ...

This artist’s impression shows two tiny but very dense neutron stars at the point at which they merge and explode. ESO/L. Calçada/M. Kornmesser, CC BY Billions of light years away in a remote part of ...

Nearly all stars are found inside or around galaxies, because that’s where the conditions are right for stars to form. Within galaxies, stars form inside cold, dense molecular gas clouds like those ...

Astronomers have discovered a ghostly, million-light-year-long bridge of stars connecting two massive galaxies within the Abell 3667 cluster, 700 million light-years away. This glowing thread of ...

Ever since physicist Freeman Dyson first proposed the concept in 1960, the "Dyson sphere" has been the holy grail of techno-signature hunters. A highly advanced civilization could build a "sphere" (or ...

Early-type galaxies, encompassing elliptical and lenticular systems, host the oldest and most dynamically relaxed stellar populations in the local Universe. Their stars typically formed in rapid, ...

An unusual collection of stars may represent the remnants of a dwarf galaxy that the Milky Way devoured about 10 billion years ago. Astronomers have dubbed the ancient galaxy Loki, after the Norse god ...