NuSTAR Bringing the High Energy Universe into Focus

Researchers have observed the X-ray emission of the most luminous quasar seen in the last 9 billion years of cosmic history. The new perspective sheds light on the inner workings of quasars and how they interact with their environment.

In a recent study published in The Astrophysical Journal, researchers report a first-of-its-kind measurement of a ULX taken with NASA's Nuclear Spectroscopic Telescope Array (NuSTAR). The finding confirms that these light emitters are indeed as bright as they seem and that they break the Eddington limit.

Some of the hottest spots in the Sun’s atmosphere appear in the telescope’s X-ray view.