Events

Public Lecture Series:
The Gravitas of Gravity and Why Matter Matters

Date: Feb 9 (Fri), Mar 28 (Wed) & Apr 18 (Wed)
Time: 5:45pm (Feb 9) and 5:30pm (Mar 28 & Apr 18)
Venue: KK102, K K Leung Building & Theatre T5, Meng Wah Complex
(Please see below for details)
Medium: English
Speakers: Professor Quentin Parker, Dr Stephen Ng and Dr Jeremy Lim
(please see below for details)

  • Public Lecture Series:  The Gravitas of Gravity and Why Matter Matters

(Click here to enlarge the poster)
 

About the Public Lecture Series
Astronomy is a fascinating subject studying all extraterrestrial objects and phenomena. In this public lecture series, some stunning astronomical phenomena including planetary nebulae, supernova explosions, black holes, neutron stars and cosmic web will be introduced. Participants will be amazed by the complexity and beautiful objects up above our sky.

Programme Highlights

Title: The Galactic Graveyard and the Ultimate Fate of Our Sun
Date: February 9, 2018 (Friday)
Time: 5:45pm – 6:45pm
Venue: KK102, K K Leung Building, Main Campus, HKU (Map)
Speaker: Professor Quentin A Parker, Department of Physics


A collage showing 22 individual planetary nebulae all at various distances from Earth. Credit: ESA/Hubble & NASA. Compiled by HKU Physics

About the talk:
Stars, the key building blocks of all galaxies, are born in collapsing gas clouds, live their lives as nuclear fusion reactors, and eventually die. Massive stars live fast and die young, exploding as supernovae after only a few million years. In this talk, the speaker will talk about late stage stellar evolution and how stars evolve. The speaker will focus on so called "Planetary Nebulae" that derive from stars around one to eight times the mass of our Sun, representing 90% of all stars more massive than the Sun. The speaker will describe this beautiful but short lived phase of stellar death and the implications for our own Sun a few billion years from now.


Click to register for the talk "The Galactic Graveyard and the Ultimate Fate of Our Sun"[Feb 9, 2018 (Fri)].

 

Title: Gravity at the Limits
Date: March 28, 2018 (Wednesday)
Time: 5:30pm – 6:30pm
Venue: Lecture Theatre T5, Meng Wah Complex, Main Campus, HKU (Map)
Speaker: Dr Stephen Ng, Department of Physics


A supernova is a large explosion that takes place at the end of a star's life cycle. Credit: NASA

About the talk:
Gravity is the most important force governing the structure of the Universe. In this talk the speaker will introduce gravity related phenomena under the most extreme and violent conditions in the Universe, from supernova explosions to neutron stars and black holes. When a massive star runs out of fuel, it can no longer support itself against gravity. This results in core collapse, inducing a supernova explosion. The compact core left over becomes either a neutron star or a black hole. These compact objects have ultra strong gravity, which causes some interesting effects that can never be produced on Earth.


Click to register for the talk "Gravity at the Limits" [Mar 28, 2018 (Wed)].

 

Title: The Structure of the Universe: A Cosmic Spider Web
Date: Apr 18, 2018 (Wednesday) 
Time: 5:30pm – 6:30pm
Venue: Lecture Theatre T5, Meng Wah Complex, Main Campus, HKU (Map)
Speaker: Dr Jeremy Lim, 
Department of Physics


The Cosmic Web of the Tarantula Nebula. Credit: NASA

About the talk:
We live in the Milky Way Galaxy, around a star we call the Sun that is but one of several hundred billion stars in our galaxy. There are many billions of galaxies like our Milky Way Galaxy, and in total many trillions of galaxies, in the Universe. Astronomers have found that the arrangements of galaxies in the sky resemble beads strung along the threads of a spider web, a pattern named the Cosmic Web. This talk will show how astronomers measure the distribution of galaxies in the sky, and why a simple consideration of gravity on matter fluctuations in the early Universe produced the Cosmic Web.


Click to register for the talk "The Structure of the Universe: A Cosmic Spider Web"
[Apr 18, 2018 (Wed)].


ALL ARE WELCOME.
 

 For enquiries, please contact Mr Benjamin Miu at 3917 2683.