HaloSat’s launch for the study of the halo of gas around the Milky Way as part of the search for the universe's missing matter. Image: NASA/Aubrey Gemignani
Where is the missing matter in the universe? - space science news

A new NASA-sponsored CubeSat mission, deployed from the International Space Station on July 13, will help astronomers to detect where thus far undetected matter is in the universe. Scientists estimate that this amounts to 50% of all the matter that has formed in the early years of the universe. Half of the matter has formed gas, dust, planets, etc, but what happened to the other half is still unknown. With the new mission, astronomers will look for the missing matter in the space between galaxies or in galactic halos that surround galaxies. Scientists suspect that the missing matter is hidden in the gas in these structures of two million degrees Celcius (3.6 million degrees Fahrenheit).

Read the full story: NASA