Skip to main content
Toggle navigation
Astronomy
Search Terms
Submit Search
Home
About
Chair's Welcome
Department History
150 Years of Women at Berkeley Astronomy: Early Stars
Campbell Hall
Diversity, Inclusion and Climate
Jobs & Fellowships
Contact Us
People
Faculty
Graduate Students
Lecturers
Postdocs
Researchers
Staff
Visiting Scholars
Small Council
Undergraduate
Requirements of the Astrophysics Major
Declaring the Major
Undergraduate Courses
Summer Courses and Concurrent Enrollment
Undergraduate Advising and Resources
Graduate
Degree Requirements
How to Apply
Graduate Resources
Teaching and Research
Student Advising
Visit 2025
Research
Facilities
Research Centers
Student Research Opportunities
Research Areas
Research Snapshot
Labs
News & Events
Department News
Department Events
Winter Newsletters
Selected Talks
Community Resources
Reporting Discrimination and Harassment
Libraries (campus)
Campus Resources
Outreach
Family Friendly Policies
Integrity Statement
Secondary navigation
Visit
Giving
Astro Intranet
Quick Links
Quick Links
Financial Aid
Tuition
Student Prizes & Awards
Local Resources
FAQ's
Home
Alexander Tielens
Alexander Tielens
Job title:
Visiting Scholar
Department:
Astronomy Department
Role:
Visiting Scholar
Contact
tielens@strw.leidenuniv.nl
Leiden Observatory
