Speaker: Eduardo Vitral (Space Telescope Science Institute)

Dark matter plays an elusive role in the universe, especially in its gravitational influence within dwarf galaxies. Despite being invisible, dark matter's presence can be inferred through its gravitational effects on galactic structures and the motions of stars. Traditional observational techniques have provided only partial insights into these effects, leading to debates that question the details of how dark matter is distributed within galaxies.

Data from the Hubble Space Telescope has enriched our understanding by allowing for the measurement of stars' movements in three dimensions. This analysis offers refined evidence to support current theories of dark matter distribution, and contributes meaningfully to the ongoing dialogue between theoretical predictions and empirical observations.

Dr. Eduardo Vitral will detail how these advancements in observation techniques have improved our understanding of dark matter's nature, marking a significant step forward in the study of our universe.

Recorded live on Tuesday, May 7, 2024.

The STScI Public Lecture Series offers talks on a diverse selection of cosmic topics, typically held the first Tuesday of every month. The 2024 Public Lecture Series is continuing an online-only format. This lecture will be presented with a livestream to YouTube, and questions can be asked in the YouTube chat. As usual, the recording will also be posted on our YouTube channel. We will, as necessary, adjust from the traditional first Tuesday at 8 PM schedule to accommodate our speakers.

Live and archived recordings:

• News and introductions
• Shedding Light on Dark Matter with Hubble (YouTube)