Though hundreds of enormous high-velocity gas clouds whiz around the outskirts of our galaxy, this so-called "Smith Cloud" is unique because its trajectory is well known.
Globular clusters can somehow bear second or even third sets of thousands of sibling stars.
Sixteen telescopes from space and the ground revealed a gorging black hole in a galaxy 900 million light-years from Earth.
A new study suggests that the internal structure of a cluster is linked to the dark matter environment surrounding it.
Once thought to be a free-floating planet, astronomers have now discovered it orbits its star only once every 900,000 years.
This new, brightest example of an ultra metal-poor star will help astronomers understand how the first stars in the universe lived and died.
For those willing to brave January’s cold, five planets will look spectacular before sunrise all week.
New research suggests the existence of "primordial standard clocks,” in the form of heavy particles, which can be used to measure the passage of time at the universe's birth.
Invisible structures shaped like noodles, lasagna sheets, or hazelnuts could be floating around in our galaxy radically challenging our understanding of gas conditions in the Milky Way.
In research aiming to understand how life might develop, scientists realized new life would commonly die out due to runaway heating or cooling on their fledgling planets.
Failure to find active microbes in coldest Antarctic soils has implications for the search for life on Mars.
The gravitational tug on outer solar system objects indicates this giant world -- if it exists -- would be 5,000 times more massive than Pluto and take up to 20,000 years to orbit the Sun.
This type of galaxy represents a special and rare class in the nearby universe, and it is believed to host stellar explosions or winds strong enough to eject ionizing photons.
Astronomers assume that this possible “intermediate mass” black hole is a key to understanding the birth of supermassive black holes located in the centers of galaxies.