Home
People
Faculty & Emeriti
Research associates
Support staff
PhD students
MSc students
BSc students
Gallery
Leiden graduates
Grants and awards
Events
Colloquia
Lunch talks
PhD Colloquia
Student Colloquia
All Events
Prize Lectures
Workshops
Science day 2023
Informational pages
New Campus Building
Education
Travel and expenses
STRW FAQ
Webmail
Computers
Posters
IP telephony
LKBF
Library
Facility Management
STRW Logos
WEBLectures
Remote Teaching site
Jobs
About
Organisation
Contact info
Travel directions
Parking
Annual reports
History
Famous Leiden astronomers
Leiden graduates
Scientific Integrity
Diversity and Inclusion Committee
Observatory Allies
Social Committee
Wellbeing Committee
Sustainability
Social safety
Intranet
Thesis
Leiden University
Xuechen Zheng
Cover image
Full THESIS in PDF
Propositions