Decades ago, astronomers estimated that “ordinary” matter (basically everything that isn’t dark matter or dark energy) makes up 5% of the universe. There was just one problem—they had no idea where ...

Stars don't form out of nothing, but tracking the gas and dust that do eventually form stars is hard. They float around the galaxy at almost absolute zero, emitting essentially no light, and generally ...

This previously unknown gap in the cooler interstellar medium appears to act as a passageway, allowing hot gas from the LHB to escape.

The Milky Way's interstellar medium—that is, the dust and gas that threads between our galaxy's billions of stars—is an abundant yet elusive material. That means the latest image from NASA's ...

Harvard astronomer Avi Loeb suggests that if interstellar object 3I/ATLAS isn't a comet, nor an asteroid, it may have been ...

Priscilla Diane Chapman Frisch, a University of Chicago Research Professor in Astronomy and Astrophysics and a world-leading scientist on the heliosphere and the local interstellar medium, died on ...

Stars of all ages and masses emit electromagnetic energy in different ways, and these emissions attract the attention of ...

Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object ...

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In the case of Voyager 1, it’s been picking up the faint hum of plasma waves in the interstellar medium. The plasma that Voyager 1 is encountering was produced by our Sun, the researchers say.

Research on heliospheric physics and interstellar medium dynamics has advanced our understanding of the complex interaction between the solar wind and the interstellar environment. The heliosphere ...