UniversePEER REVIEWED

Black Hole Jets Reach Far Into Space to Shape Galaxy Growth

By Space.Fan Editorial DeskSeptember 26, 2026 at 9:00 PM UTC

Scientists have found that powerful jets from black holes can travel far beyond a galaxy's edge to control how new stars are born.

Image · Phys.org

The Drop

Galaxies are surrounded by a massive, invisible envelope of gas called the circumgalactic medium, or CGM. This area is like a gas station for the galaxy, providing the raw materials needed to create new s. For a long time, astronomers wondered why some galaxies seem to stop building s, even when they have plenty of this gas available. A new study suggests that supermassive s at the center of galaxies act like gatekeepers. These s can blast narrow, super-hot streams of energy, known as jets, deep into the surrounding gas. By using data from the DESI survey and the LOFAR radio telescope, researchers were able to see that this gas glows most brightly along the path of these powerful jets. This proves that the 's energy is traveling much further than anyone realized. The jets heat the gas up, which prevents it from cooling down and forming into new s. Essentially, these tiny, dense s are using jets of plasma to reach out across thousands of s and influence the entire galaxy's future.

Why It Matters

This discovery helps solve a major mystery in space science: what stops galaxies from growing? By confirming that jets reach far beyond the visible galaxy, scientists can now explain why some galaxies run out of the cool gas needed for formation. This changes how we think about the life cycle of galaxies and the role s play in their evolution.

The Catch

While the evidence shows that gas glows brighter near these jets, it is still difficult to measure exactly how much energy is being transferred over such massive distances. The study relies on observations that act as a snapshot, so researchers have not yet watched the long-term process of a jet heating the gas in real-time.

Put That in Perspective

A black hole is relatively tiny compared to the galaxy it lives in, often the size of our solar system within a galaxy holding billions of stars. Researchers plan to use this information to continue mapping how these powerful jets influence the connections between black holes and the stars that form in the far reaches of a galaxy.

Source September 26, 2026

Sanchayeeta Borthakur, Namrata Roy

Arizona State University, Raman Research Institute·Astrophysical Journal Letters

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