Skip to main content

Navigation Menu

Back
About
- Back
- About
  
  Contact Us
  Business Address
  5241 Broad Branch Rd. NW 
  Washington , DC 20015
  United States place Map
  Call Us (202) 387-640
- Who We Are
- Connect with Us
- Working at Carnegie
Contact Us
Business Address
5241 Broad Branch Rd. NW 
Washington , DC 20015
United States place Map
Call Us (202) 387-6400
Research
- Back
- Research Areas & Topics
- Research Areas & Topics
  - Back
  - Research Areas
  - From genomes to ecosystems and from planets to the cosmos, Carnegie Science is an incubator for cutting-edge, interdisciplinary research.
  - Astronomy & Astrophysics
    
    Back
    
    Astronomy & Astrophysics
    
    Astrophysical Theory
    
    Cosmology
    
    Distant Galaxies
    
    Milky Way & Stellar Evolution
    
    Planet Formation & Evolution
    
    Solar System & Exoplanets
    
    Telescope Instrumentation
    
    Transient & Compact Objects
  - Earth Science
    
    Back
    
    Earth Science
    
    Experimental Petrology
    
    Geochemistry
    
    Geophysics & Geodynamics
    
    Mineralogy & Mineral Physics
  - Ecology
    
    Back
    
    Ecology
    
    Atmospheric Science & Energy
    
    Adaptation to Climate Change
    
    Water Quality & Scarcity
  - Genetics & Developmental Biology
    
    Back
    
    Genetics & Developmental Biology
    
    Adaptation to Climate Change
    
    Developmental Biology & Human Health
    
    Genomics
    
    Model Organism Development
    
    Nested Ecosystems
    
    Symbiosis
  - Matter at Extreme States
    
    Back
    
    Matter at Extreme States
    
    Extreme Environments
    
    Extreme Materials
    
    Mineralogy & Mineral Physics
  - Planetary Science
    
    Back
    
    Planetary Science
    
    Astrobiology
    
    Cosmochemistry
    
    Mineralogy & Mineral Physics
    
    Planet Formation & Evolution
    
    Solar System & Exoplanets
  - Plant Science
    
    Back
    
    Plant Science
    
    Adaptation to Climate Change
    
    Nested Ecosystems
    
    Photosynthesis
    
    Symbiosis
- Divisions
  - Back
  - Divisions
  - Biosphere Sciences & Engineering
    
    Back
    
    Biosphere Sciences & Engineering
    
    About
    
    Contact Us
    Business Address
    5241 Broad Branch Rd. NW 
    Washington , DC 20015
    United States place Map
    Call Us (202) 387-640
    
    Research
    
    Culture
  - Earth & Planets Laboratory
    
    Back
    
    Earth & Planets Laboratory
    
    About
    
    Contact Us
    Business Address
    5241 Broad Branch Rd. NW 
    Washington , DC 20015
    United States place Map
    Call Us (202) 387-640
    
    Research
    
    Culture
    
    Campus
  - Observatories
    
    Back
    
    Observatories
    
    About
    
    Contact Us
    Business Address
    5241 Broad Branch Rd. NW 
    Washington , DC 20015
    United States place Map
    Call Us (202) 387-640
    
    Research
    
    Culture
    
    Campus
- Instrumentation
People
- Back
- People
  
  Observatory Staff
  
  Featured Staff Member
  
  Staff Member
  
  Professional Title
  Learn More
  
  Observatory Staff
  
  Search For
- Search All People
Observatory Staff
Dr. Allan Spradling

Staff Scientist, Emeritus Director

Featured Staff Member

Dr. Allan Spradling - HHMI

Staff Scientist, Emeritus Director
Learn More

Observatory Staff
Dr. Allan Spradling

Staff Scientist, Emeritus Director

Allan Spradling and his team focus on the biology of reproduction, particularly oogenesis — the process of egg formation.

Search For

Search All Staff
Events
Upcoming Events

Events

Events

Workshop

Seventh Workshop on Trait-based Approaches to Ocean Life

Pacific Grove, CA

August 4

9:00pm PDT

Public Program

Mercury beyond MESSENGER: Recent Progress from the Earth and Planets Laboratory

Anne Pommier, Staff Scientist, EPL

June 5

6:30pm EDT

Seminar

Microenvironmental ecology and symbiosis

Dr. Michael Kühl

May 14

11:00am PDT
News
News

Recent News

News
Read all News

Breaking News
July 10, 2025

The History of Las Campanas Observatory

Breaking News
June 18, 2025

10 Iconic Photographs of Vera Rubin

Breaking News
June 17, 2025

Inside Mercury: What Experimental Geophysics Is Revealing About Our Strangest Planet
Donate
- Back
- Donate
  
  - ,
- Make a Donation
I feel passionately about the power of nonprofits to bolster healthy communities.

- Jo Ann Eder , Astronomer and Alumna

Header Text

Postdoctoral alumna Jo Ann Eder is committed to making the world a better place by supporting organizations, like Carnegie, that create and foster STEM learning opportunities for all.
Learn more arrow_forward

Home
Spectra of explosions

Spectra of explosions

1920

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Get the latest

Subscribe to our newsletters.

Email

Instagram
Twitter
Youtube
Facebook

Science

Biosphere Sciences & Engineering
Earth & Planets Laboratory
Observatories
Research Areas
Strategic Initiatives

Legal

Financial Statements
Conflict of Interest Policy
Privacy Policy

Careers

Working at Carnegie
Scientific and Technical Jobs
Postdoctoral Program
Administrative & Support Jobs
Carnegie Connect (For Employees)

Contact Us

Contact Administration
Media Contacts

Business Address

5241 Broad Branch Rd. NW

Washington, DC 20015

© Copyright Carnegie Science 2025