Gravitational self-lensing of massive black hole binaries

A "massive" black hole (MBH) is one whose mass is more than about one hundred thousand solar-masses. MBHs reside at the centers of most galaxies, and when they actively accrete gas and dust onto their surrounding hot disk ...

Image: Hubble views galaxy NGC 5728

Meet NGC 5728, a spiral galaxy around 130 million light-years from Earth. This image was acquired using Hubble's Wide Field Camera 3 (WFC3), which is extremely sensitive to visible and infrared light. Therefore, it beautifully ...

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