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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.
The relatively unexplored southwestern region of the Large Magellanic Cloud is host to a massive, embedded star-forming complex that rivals the star-forming efficiency of 30 Doradus. Its most luminous object could be a super star cluster in formation.
Chloromethane (CH3Cl) has been observed towards a low-mass protostar and comet 67P, making it the first organohalogen detected in space. The species was previously considered to be a biomarker, but the authors suggest viable alternative abiotic formation routes.
By assessing the ionization fraction of the environment around Tycho’s (type Ia) supernova, the authors have constrained the properties of its progenitor enough to rule out a hot, luminous white dwarf. A double white dwarf binary merger is allowed.
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.
Complex organics are now observed throughout the Universe, forming in the circumstellar environments over thousands of years and providing materials for star formation. Did the Earth inherit any of these organics at the time of its formation?