<ul><li>Astronomers have discovered a new class of cosmic X-ray sources called “millinovae”.</li><li>These millinovae were found in nearby galaxies and showed long-lasting outbursts.</li><li>The discovery was made by analyzing data from the Optical Gravitational Lensing Experiment (OGLE), a survey run by the University of Warsaw.</li><li>Millinovae are thought to be binary star systems where a white dwarf and a subgiant star orbit closely, allowing material from the subgiant to flow onto the white dwarf.</li></ul>

Astronomers discover new class of cosmic X-ray sources

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