To confirm whether some galaxies have suspiciously low amounts of dark matter, we need to be sure how far away they are.
I attended AAS Congressional Visits Day. Here is what happened.
What if we used stars other than Cepheids to measure distances?
The Tip of the Red Giant Branch (TRGB) allows for another H0 measurement to enter the ring. Credit for “H0tTake” goes to the conference “Tensions between the Early and the Late Universe” hosted at the Kavli Institute for Theoretical Physics!
In light of the October 30 ruling on the Thirty Meter Telescope, a review of modern astronomy on Mauna Kea seems warranted. This post came out of the Astrobites Policy Committee, which focuses on science and the government.