Science Updates - A look at CfA discoveries from recent journals

Hubble Space Telescope images of a microlens system.
March 27, 2020

The path of a light beam is bent by the presence of mass, as explained by General Relativity. A massive body can therefore act like a lens - a so called "gravitational lens" – to distort the image of an object seen behind it.

NGC 6334
March 20, 2020

Astronomers have long realized that the process of making new stars is very inefficient. In the Milky Way the overall efficiency is only about 5% as measured by the mass in stars compared to the total mass of the galaxy.

dark matter map
March 6, 2020

About eighty-five percent of the matter in the universe is in the form of dark matter, whose nature remains a mystery, and the rest is of the kind found in atoms. Dark matter exhibits gravity but otherwise does not interact with normal matter, nor does it emit light.