Space solutions to critical military problems
Johns Hopkins Applied Physics Laboratory Civil Space
We Lead Missions To Explore the Habitability of Other Worlds
APL leads Dragonfly — a game-changing rotorcraft to study the surface and organic chemistry of Saturn's largest moon, Titan.
From The Sun to Pluto and Beyond
Our spacecraft and instruments have helped "touch" the Sun, measure and track Earth’s magnetosphere, search for ancient water on Mars, probe the mysteries of Pluto and measure the boundaries of our solar system before entering interstellar space. And those discoveries are just the beginning.
Featured Mission
IMAP
NASA’s Interstellar Mapping and Acceleration Probe (IMAP) mission, which APL is building in partnership with Principal Investigator David McComas of Princeton University, will explore our solar neighborhood, called the heliosphere — decoding the messages in particles from the Sun and beyond our cosmic shield.
View the Mission
More APL Missions
Our Organization
Since the dawn of the Space Age, Johns Hopkins APL has pushed the frontiers of space science, engineering and exploration. Learn more about how we lead missions from design and build through operations and data delivery.
National Security Space
Space Formulation
Leaning forward to take on the challenges of the future
Leaning forward to take on the challenges of the future
Civil Space Flight
From the Sun to Pluto and beyond
From the Sun to Pluto and beyond
Our People
We are scientists, engineers, planners and dedicated professionals committed to exploring space and expanding humanity’s knowledge of the Sun-Earth system, our moon, the solar system and beyond. We do the impossible every day. Learn more about our people.
Nelli Mosavi-Hoyer
Women in Aerospace Lauds Johns Hopkins APL’s Mosavi-Hoyer for Outreach Leadership
Nelli Mosavi-Hoyer, an engineer and project manager with the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, was recognized with Women in Aerospace’s 2023 Aerospace Awareness Award for her leadership and outreach efforts. As project manager for NASA’s EZIE and Van Allen Probes missions, Mosavi-Hoyer has been inspiring students and building a path for people around the world to make significant contributions to space missions.
Science
Learn more about our research in planetary science, Earth science, heliophysics and astrophysics.
Engineering
Learn more about our spacecraft and instruments as well as our mission design and operations teams who are helping to expand humanity’s understanding of the universe every day.
For the Media
Learn more about APL’s missions and discoveries — and the people who make it all happen. Use our Media Center to find high-resolution images and HD videos, receive detailed mission information, or contact a public affairs representative.