Dark matter, Bianary stars, and Frank Zwicky

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from wikipedia: Frank Zwiky:

 Swiss astronomer. He worked most of his life at the California Institute of Technology in the United States of America, where he made many important contributions in theoretical and observational astronomy. In 1933, Zwicky was the first to use the virial theorem to infer the existence of unseen dark matter, describing it as "dunkle Materie".

and Wikipedia on the Zwiky transient facility:

The Zwicky Transient Facility is designed to detect transient objects that rapidly change in brightness, for example supernovae, gamma ray bursts, and collision between two neutron stars, and moving objects like comets and asteroids.

for example: here is one of their headlines: Zwicky Transient Facility Nabs Several Supernovae a Night

and then there is this as an example:

Artwork • February 7th, 2019 Artwork showing a pair of white dwarfs in orbit around each other with an accretion disk. This illustrates what happens when one star begins to siphon material off its partner. The white dwarf stars are similar in size to earth but they are 200,000 times more dense. ZTF is well-suited to detect binary star systems like this one.

Credit: CalTech