Astronomers have long struggled with a troubling puzzle: a significant portion of normal matter in the universe appeared to ...

A distant galaxy that lay quiet for decades has suddenly stirred, lighting up in dramatic bursts that have caught astronomers ...

Stars are the architects of nearly all the chemical elements in the universe, including ones crucial to life as we know it, such as carbon and oxygen. Yet, despite decades of research, aspects of star ...

All of these signs suggest that the object is the afterglow of a now-dormant black hole, which once spewed radiation that ionized the surrounding gas, causing it to emit light even after the black ...

the heating mechanisms affecting gas within just a few hundred light years of the black hole. According to the scientists, the observations help researchers better understand the extreme ...

Scientists have observed a previously inactive supermassive black hole producing regular, powerful X-ray eruptions that ...

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

"When we first saw Ansky light up in optical images ... The accretion disk could be formed by gas captured by the black hole from its neighborhood, and not a disintegrated star.

The compound is known colloquially among recreational drug users as “whippets,” "balloons," “hippie crack” or “Galaxy Gas,” ...

Uncover the insights gained from the Webb telescope about early galaxies and their role in illuminating the universe.

Most people know that black holes are kind of scary. Admittedly, that's true, but black holes are so much more than that.

GS-z13-1, marks the earliest sign yet spotted of the era of cosmic reionization at 330 million years after the Big Bang.