April 2015

Saturday, Jan 31–Sunday, May 17
5:00 pm
Astronomical: Photographs of Our Solar System and Beyond

The evolution of photography has been inextricably bound up with the field of astronomy. Since photography's earliest days, it has been used as a tool to advance astronomical observation and thought, yielding some of the most curious and compelling images in the medium's history. Featuring works by a diversity of makers ranging from pioneering scientists to artists and amateurs, this exhibition surveys mankind's ongoing efforts to chart and understand an expanding universe.

Center for Creative Photography Gallery
1030 N. Olive Rd.

Free to the public
Center for Creative Photography Gallery: Room
Tuesday, Apr 21
3:45 pm — 5:00 pm
LPL Colloquium: Dr. Alexander Hayes
Dr. Alexander Hayes
Assistant Professor
Cornell University

A Mariner's Insights in Titan's Hydrologic System: Glassy Seas, Depth Finders, and Magic Islands

Within the past two years, the Cassini spacecraft has made several groundbreaking discoveries regarding Titan's lakes and seas. These observations suggest the presence of wave-roughened surfaces, directly measure bathymetric profiles through Titan seas, constrain the volume of the exposed liquid inventory, contain liquid composition in both the north and south polar regions, depict the emergence and disappearance of mysterious transient features affectionately dubbed "Titan's Magic Islands", and place constraints on the formation and evolution of polar basins. In this seminar, we will review these recent discoveries and discuss their impact on our knowledge of Titan's Hydrologic System.

Host: Dr. Caitlin Griffith
Kuiper Space Sciences: Room 312
Monday, Apr 27
4:00 pm — 5:00 pm
TAP Colloquium: Cora Dvorkin
Dr. Cora Dvorkin
Hubble Fellow
Harvard University

Probing Fundamental Physics with Cosmology

Cosmological observations have provided us with answers to age-old questions, involving the age, geometry, and composition of the universe. However, there are profound questions that still remain unanswered. In this talk, I will describe ongoing efforts to shed light on some of these questions. The origin of the small anisotropies that later grew into the stars and galaxies that we see today is still unknown. However, the nature of the anisotropies in the Cosmic Microwave Background (CMB) provides strong evidence that they were generated long before the CMB radiation had its last interaction with ordinary matter. In the first part of this talk, I will explain how we can use measurements of the CMB, which was last scattered when the universe was 380,000 years old, to reconstruct the detailed physics of much earlier epochs, when the universe was only a tiny fraction of a second old. In the last part of the talk, I will discuss how we can use observations of the CMB and the large-scale structure of the universe to improve our understanding of another open question in fundamental physics. Cosmological observations and galaxy dynamics seem to imply that 84% of all matter in the universe is composed of dark matter, which is not accounted for by the Standard Model of particles. The particle nature of dark matter is one of the most intriguing puzzles of our time. I will identify cosmological processes in which the particle interactions of dark matter are of relevance and show how we can use current and future cosmological data to probe these interactions both at large and small scales.

TAP Colloquia
Kuiper Space Sciences: Room 312
Tuesday, Apr 28
3:45 pm — 5:00 pm
LPL Graduate Student Colloquia: Hamish Hay and Shane Stone
Hamish Hay
Graduate Student in the Department of Planetary Sciences

Shane Stone
Graduate Student in the Department of Planetary Sciences
Kuiper Space Sciences: Room 312