The AAS announces its call for applications for the Harlow Shapley Visiting Lectures Program. We are seeking astronomers and host institutions to participate in 2027!

YouTube video by Natasha Tsakos

/PRNewswire/ -- O'Shaughnessy Ventures LLC (OSV), an investment firm that empowers creators, has awarded an O'Shaughnessy Fellowship to Jenny Wagner, an...

YouTube video by Jenny Wagner

Why this physicist says “we are now ready to move on...”

Dr. Jenny Wagner, Astrophysicist

Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics

YouTube video by Urknall, Weltall und das Leben

YouTube video by Urknall, Weltall und das Leben

YouTube video by Urknall, Weltall und das Leben

For most galaxies in the cosmos, our knowledge of their motion is limited to line-of-sight velocities from redshift observations. To determine the radial velocity between two galaxies the minor and ma...

The dwarf spheroidal galaxy, Segue 1, is thought to have one of the largest ratios of dark matter to stellar mass. Using orbit-based dynamical models, we model Segue 1, including a dark halo and a cen...

We use numerical simulations to explore biases that arise in dynamical estimates of the mean mass profile for a collection of galaxy clusters that have been stacked to make a composite. There are thre...

The mass of the Local Group (LG), comprising the Milky Way (MW), Andromeda (M31), and their satellites, is crucial for validating galaxy formation and cosmological models. Traditional virial mass esti...

Ostriker is responsible for groundbreaking discoveries that forever changed the way astronomers think about what the universe is made of, including the existence of dark matter.

We present a scheme for numerically solving Maxwell's equations in a weakly perturbed spacetime without introducing the usual geometric optics approximation. Using this scheme, we study light propagat...

For most galaxies in the cosmos, our knowledge of their motion is limited to line-of-sight velocities from redshift observations. To determine the radial velocity between two galaxies the minor and ma...