Type Ia Supernovae Could Use Some More Color
Including the color of the local environments of Type Ia supernovae in our analyses could help us use them as more precise cosmological tools.
Ideal cosmic yardstick: neutron star black hole mergers as standard sirens
Neutron star black hole mergers are an ideal way to measure the Hubble constant.
Just how far away is the Pleiades?
The Pleiades is one of the most well-known open clusters visible with the naked eye from Earth. But just how far away is the cluster? New results help determine a more accurate distance and suggest a troubling error in a previous study.
A New Galactic Yardstick
We can measure the expansion of the universe with velocities and distances of extragalactic objects. But measuring distances is tough! The authors of this paper have developed a new technique for measure the distances of AGN using the “echo” of light from heated dust.
A Brand New Way to Determine Hubble’s Constant
This paper demonstrates a brand new method of calculating Hubble’s Constant using the luminosity of HII galaxies.