Looking for a really big story, I naturally headed for "Galaxies in Collision." Bradley Whitmore of the Space Telescope Science Institute in Baltimore brought us up to speed. We've known for a ...

Sagittarius A* as seen through the Event Horizon Telescope. Credit: ESO/José Francisco Salgado, EHT Collaboration With respect to structure, there are three types of galaxies: spiral, elliptical ...

Enjoy dark skies for evening observing, then catch a meteor shower and a planetary conjunction in the morning sky this week.

Yet it does something galactic researchers only thought possible in much more massive elliptical galaxies ... called Sagittarius A*, is much smaller and currently dormant, it could (one far-off day) ...

Rosemary F. G. Wyse of Johns Hopkins University reported on our space invader, the dwarf galaxy known as Sagittarius. Three astronomers had been studying small squares of sky, measuring the motion ...

Our own Milky Way has a 4 million solar mass black hole – Sagittarius A (Sgr A*) – at its centre, but this is currently in an extremely quiet and dormant state. That could change if a gas cloud, star, ...

By analyzing the available observational data, astronomers from the Tribhuvan University in Nepal and elsewhere have ...

On one hand you have spheroid dwarf galaxies, spiral dwarf galaxies and elliptical dwarf galaxies, and on the other you have irregular dwarf galaxies. The latter are chaotic galaxies that lack a ...

Astronomers using W. M. Keck Observatory on Maunakea, Hawaiʻi Island have found compelling evidence of a dark matter-deficient dwarf galaxy, FCC 224. This ultra-diffuse galaxy is located on the ...