Press Play or drag the progress slider to fly NASA's real Parker Solar Probe mission arc - repeated Venus gravity assists tightening the orbit toward the Sun.
Parker Solar Probe 3D Explorer
Scrub the progress slider to fly NASA's real Parker Solar Probe mission: seven Venus gravity assists between 2018 and 2024 that lower the spacecraft's closest approach to the Sun step by step, ending in the record-closest 3.8-million-mile (6.1 million km) pass on December 24, 2024.
Drag to orbit the view, scroll or pinch to zoom, and press Play or Pause to animate the timeline. Drag the progress slider to jump straight to any of the ten real mission milestones, or click the Sun, Venus, or the spacecraft marker to refresh the facts panel.
That closest pass set a second record at the same time: about 430,000 mph (about 692,000 km/h), the fastest speed any human-made object has ever reached.
- Procedural flight path threading launch, each real Venus gravity-assist flyby, and the progressively tighter solar perihelia in the correct order
- A heat-shield note appears near the record-closest approach, showing the shield's published temperature rating alongside the spacecraft body's near-room-temperature interior
Students use it to see why repeated Venus flybys, not a single direct dive, are how a spacecraft reaches the Sun without burning far more fuel than any rocket can carry; teachers point to the shrinking-orbit sequence when explaining gravity-assist trajectory design; and curious readers scrub straight to December 2024 to see the exact moment the probe broke its own speed and distance record.
| Quantity | Published value | Source |
|---|---|---|
| Launch | 2018-08-12 | NASA Science Parker Solar Probe mission page |
| First perihelion | 2018-11-05, 0.166 AU (about 15.4 million mi / 24.8 million km), speed 95.3 km/s | NASA Science Parker Solar Probe mission page |
| Record perihelion after Venus flyby #2 | 2020-01-29, about 11.6 million mi from the Sun's surface - about 20% closer than the first three perihelia | NASA Science / Johns Hopkins APL news release |
| Perihelion after Venus flyby #6 | 2023-09-27, about 4.5 million mi (7.2 million km) from the Sun's surface | NASA Science Parker Solar Probe blog |
| Final Venus flyby (#7 of 7) | 2024-11-06, about 240 mi (387 km) from Venus' surface | Johns Hopkins APL news release 241108-venus-gravity-assist-7 |
| Record-closest perihelion | 2024-12-24, about 3.8 million mi (6.1 million km) from the Sun's surface, about 9.86 solar radii, speed about 430,000 mph (about 692,000 km/h) | NASA Science "Makes History With Closest Pass to Sun" |
| Heat shield rating | 4.5 in (11.43 cm) carbon-composite, rated to about 2,500 F (1,377 C) | NASA Science Parker Solar Probe mission page |
The whole Parker Solar Probe mission arc is drawn on your device with WebGL, so each milestone appears locally with no round trip to a server. The vendored three.js engine downloads once (about 0.7 MB) and is then cached, no account or upload is needed, and no scene data leaves your browser.
The scene is an educational approximation of Parker Solar Probe's mission arc, not a precomputed ephemeris of the real trajectory. The flight path is a parametric teaching curve tuned to show the real launch, Venus-flyby, and perihelion milestones in the correct order and sequence - orbit shape and radii on screen are compressed for legibility, and the table above holds the real published dates, distances, and speeds.
For a step-by-step walkthrough, read the Parker Solar Probe 3D Explorer how-to guide. The Space 3D collection also includes a DART Asteroid Deflection explorer for another real spacecraft-trajectory mission and a Solar Wind and Heliosphere explorer for the environment Parker Solar Probe was built to fly through.
Frequently Asked Questions
What does the Parker Solar Probe 3D Explorer show?
A procedural flight path threading NASA's real Parker Solar Probe mission from its August 2018 launch through seven Venus gravity-assist flybys to the record-closest solar perihelion on December 24, 2024. Scrub the progress slider or press Play to move through the timeline, and the panel lists the published dates, distances, and speeds for each milestone.
Why does Parker Solar Probe fly past Venus instead of heading straight for the Sun?
A spacecraft launched from Earth still carries most of Earth's own orbital speed around the Sun, which makes a direct dive expensive in fuel. Each of the seven Venus flybys uses the planet's gravity to shed some of that speed for free, lowering the spacecraft's closest approach to the Sun a little more without needing extra propellant.
How close did Parker Solar Probe actually get to the Sun?
On December 24, 2024, following its seventh and final Venus flyby, Parker Solar Probe passed about 3.8 million miles (6.1 million km) from the Sun's surface - about 9.86 solar radii - at a record speed of roughly 430,000 mph (about 692,000 km/h), the fastest any human-made object has ever traveled.
How does the spacecraft survive that close to the Sun?
A 4.5-inch (11.43 cm) carbon-composite heat shield, called the Thermal Protection System, faces the Sun at all times and is rated to withstand about 2,500 F (1,377 C). The spacecraft body and instruments sit in the shield's shadow and stay near room temperature.
How many times has Parker Solar Probe flown past Venus?
Seven times between October 2018 and November 2024. Each flyby tightened the orbit's closest point to the Sun; the seventh and final flyby, on November 6, 2024, passed about 240 miles (387 km) from Venus' surface and set up the mission's record-closest solar approach.
Is this a real-time tracker or a physics simulation?
No. The flight path is a parametric teaching curve tuned to show the real launch, Venus-flyby, and perihelion milestones in the correct order - it is not a precomputed ephemeris of the spacecraft's actual trajectory. Orbit shape and radii on screen are compressed for legibility; the panel and the table on the main page hold the real published NASA and Johns Hopkins Applied Physics Laboratory dates, distances, and speeds.