Tune in now for the first extrasolar weather map of a nearby brown dwarf, made using Doppler imaging.
By examining their expansion rate over time, Type II supernovae provide a way to measure extragalactic distances.
From measurements of quasar spectra, we can determine whether or not the fine structure constant is really a constant.
Today we take a look back to 1916, when distances were measured in light years and uncertainties weren’t to be included in publications. The nearly 100-year old discovery of a small star has large implications for our understanding of stellar astrophysics, even today.
By sending a chamber of dust on a suborbital ballistic rocket, the authors of this paper hope to find out how planetesimals form.
I’m spending a month at the South Pole working on a CMB telescope. In this last post, we tour South Pole Station and run a race around the world!
I’m spending a month at the South Pole working on a CMB telescope. In this installment, I measure the telescope’s sidelobes and close up a receiver.
I’m spending a month working on a telescope at the South Pole. In this post, we take a tour of the two observatory buildings hosting Cosmic Microwave Background experiments.
Everything in our galaxy is moving– you, the earth underneath you, the sun, other stars– everything. However, it turns out that figuring out how fast some of these things are moving is surprisingly difficult, and can have Galactic-sized implications!
I recently attended a two-week crash course in the “Astrophysical Applications of Gravitational Lensing”. In this post, I overview a few of the ways astronomers employ lensing to study the Universe, from extrasolar planets to distant quasars and large-scale structure.