The lightcurve of 2025 MN45 — the fastest-rotating asteroid with a diameter over 500 meters that scientists have ever found. The y-axis shows the asteroid’s brightness, and the x-axis shows its phase, ...

A research team has investigated long-term X-ray variability in the neutron star NGC 7793 P13, an object thought to be driven by supercritical accretion, where an extraordinary amount of gas falls ...

In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4).