Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer).
Interstellar medium is the space between the stars. The interstellar medium is composed of gas (predominantly hydrogen and helium) and dust. Such interstellar matter makes up approximately 15% of the visible matter in our galaxy.
A candidate intermediate-mass black hole is reported within a molecular cloud near Sgr A*, the centre of our Galaxy. High-resolution observations with ALMA reveal extreme gas kinematics and a compact source consistent with a quiescent black hole.
The re-discovery of the binary star system that created the Nova Scorpii AD 1437 stellar outburst shows that it is now a dwarf nova, suggesting that nova systems spend some time as dwarf novae in between larger outbursts.
The detection and characterization of a large-scale ordered magnetic field through a gravitational lens in a galaxy beyond the local volume allows us to elucidate how such magnetic fields come about, supporting a mean-field dynamo origin.
Large haloes of diffuse molecular gas discovered around high-redshift starburst galaxies show that galactic feedback, coupled to turbulence and gravity, extends the starburst phase instead of quenching it.
The stardust component of interstellar dust has been quantified by analysing samples of pre-solar dust grains from meteorites and found to be at least twice as much as had been thought. The silicate portion follows the size distribution of interstellar dust.