How much does the Milky… weigh?
How do we measure the mass of our own galaxy? Today’s authors use simulations to compare (and improve) several methods.
Good vs. Evil: A Cosmic Challenge
Yes, even astronomers get competitive. Which team will develop the best method to measure the Hubble constant, H0, using information derived from strong gravitational lensing images?
Astrobites at AAS 231: Day 1
We report on Day 1 of the winter AAS meeting in National Harbor, MD. Highlights include a spectacular look at Jupiter’s poles, a look at the major upcoming exoplanet survey TESS, and insight into the expanding universe from Nobel prize winner Adam Riess.
Meet the AAS Keynote Speakers: Adam Riess
To unlock the secrets of the (local) universe, Adam Riess observes the brightness of supernovae and Cepheid variables to measure the distance to galaxies far, far away. Read more about his research before his plenary talk at #AAS231 on Tuesday.
What is the Most Massive Object in the Universe?
Trying to find the most massive galaxy cluster in the night sky can be hard. Comparing predictions of these masses to observed clusters? Even harder. An insight into the world of Halo Mass Functions and their tail-ends.
Hunting for the faintest galaxies
The universe is filled with tiny, faint dwarf galaxies. The authors of this paper are on the hunt for them.