All galaxies are a complex ecosystem of interactions between hydrogen gas and stars. In today’s paper, the authors look at the Horsehead Nebula to narrow down the details of those interactions.
It’s really hard to see molecular hydrogen (the fuel that makes stars) directly, so astronomers have to use other spectral lines to guess how much is there. In today’s paper, the authors discuss how to do that in the smallest galaxies in the universe!
We’re still not sure what causes quasars, some of the brightest objects in the universe, to switch on. Today’s authors present a compelling case for galaxy mergers being the culprit!
Galaxy clusters like to relax, but it takes most of them a long time to get there. In today’s paper, the authors have found an exception to that rule!
Astrophysics is a lot like life in that sometimes the journey matters more than the destination. In today’s paper, which looks at the Hydrogen Lyman-α spectral line in a high-redshift protocluster, that’s absolutely the case!