NASA’s Europa Clipper spacecraft is on its way to one of the most promising places in the solar system to look for conditions that could support life. It launched in October 2024, it is due at Jupiter in April 2030, and it will pass Earth once more on December 3, 2026 to pick up speed.
What is Europa Clipper?
Europa Clipper is a robotic, solar-powered NASA spacecraft. It will orbit Jupiter and make 49 close flybys of Jupiter’s moon Europa. Its primary objective is to determine whether Europa has conditions suitable to support life, in particular whether there are places below the moon’s surface that could do so. The mission is designed to assess whether Europa currently has habitable conditions and not to detect life directly. That distinction comes from NASA’s description of the goal as conditions suitable for life.
Why Europa?
Scientists think a saltwater ocean lies beneath Europa’s icy surface and may hold more than twice as much liquid water as all of Earth’s oceans combined. The NASA page gives no depth or volume figures and does not discuss the thickness of the ice shell, so we leave those out. Liquid water is one of the ingredients scientists look for when judging whether a world could be habitable. For the broader hunt for habitable worlds, see our entry on exoplanets.
When did it launch and when will it arrive?
- Launch: October 14, 2024, at 12:06 p.m. EDT, on a SpaceX Falcon Heavy from Launch Complex 39A at Kennedy Space Center, Florida
- Mars flyby: 2025, mentioned in passing on the NASA page
- Earth flyby: December 3, 2026, a gravity assist that adds speed
- Arrival at Jupiter: April 2030
The spacecraft will travel 1.8 billion miles (2.9 billion kilometers) to reach Jupiter. The Earth flyby is a gravity assist, a maneuver in which a spacecraft passes close to a planet to gain speed without using extra fuel. The definition is general, while the date comes from NASA. Another object that crossed the solar system on a fast path is covered in our article on 3I/ATLAS.
What instruments does it carry?
Europa Clipper carries nine science instruments plus a gravity experiment that uses the spacecraft’s telecommunications system. All the science instruments operate simultaneously on every flyby. NASA’s page does not list each instrument by name, so we do not describe their individual jobs. Having all instruments work at once lets the team compare different measurements of the same place on the same pass.
How big is the spacecraft?
With its solar arrays deployed, the spacecraft spans more than 100 feet (about 30 meters), roughly the length of a basketball court. The main body consists of an avionics vault, a radio frequency module and a propulsion module. It carries a 10-foot (3-meter) high-gain antenna that was installed on August 14, 2023. The spacecraft was built at NASA’s Jet Propulsion Laboratory in Southern California. The page does not state the mission cost.
Why does the spacecraft use solar power so far from the Sun?
NASA describes Europa Clipper as solar-powered, and its large solar arrays are what give it the 100-foot span. Sunlight is much weaker at Jupiter than at Earth, which is why the arrays must be so large. The page itself does not make that comparison, so it is a general point about the mission design and not a NASA statement.
What can readers watch for?
The nearest milestone is the Earth flyby on December 3, 2026. The long cruise then continues until Jupiter arrival in April 2030, after which the 49 flybys begin. Given that timeline, the mission’s science results are years away, and readers should treat any early claims about life on Europa with caution. NASA frames the goal as assessing habitability. For the history of NASA’s exploration, see our article on the Apollo 11 landing.
Key facts at a glance
- Launch: October 14, 2024
- Earth flyby: December 3, 2026
- Arrival at Jupiter: April 2030
- Flybys of Europa: 49
- Science instruments: nine, plus a gravity experiment
- Solar array span: more than 100 feet (about 30 meters)
Glossary: terms used here
- Flyby: a close pass by a body without entering orbit around it
- Orbiter: a spacecraft that circles a planet or moon
- Gravity assist: a maneuver that uses a planet’s gravity to change a spacecraft’s speed or direction
- Habitable conditions: conditions, such as liquid water and suitable chemistry, that could support life
- High-gain antenna: a dish that sends and receives data over long distances
These definitions are general ones and are not quoted from the NASA page.
What will Europa Clipper not do?
It will not land on Europa and it will not drill into the ice. It is an orbiter that makes close flybys, so its measurements come from passing above the surface. NASA describes it as an orbiter and flyby mission, and the description of the goal as assessing habitable conditions follows from that design. Questions that need a lander or a drill would have to be answered by a later mission.
What would count as success?
NASA states the goal as determining whether Europa has conditions suitable to support life. Our own reading is that success would be a clear answer either way: finding evidence of a habitable environment, or finding that the conditions are not suitable. Both outcomes would narrow the search for life beyond Earth. The page does not define success criteria in more detail than that.
Frequently asked questions
Will Europa Clipper look for life?
It will assess whether Europa has conditions suitable for life, not search for living organisms directly.
When does it reach Jupiter?
April 2030, after an Earth flyby on December 3, 2026.
How many times will it fly by Europa?
49 close flybys.
Is Europa’s ocean larger than Earth’s?
Scientists think it may hold more than twice as much liquid water as all of Earth’s oceans, according to NASA.