Catching an Interstellar Wanderer with a Solar Sling express
Imagine trying to catch a train that’s already pulling away. But if you first dive extremely close to the Sun to get a massive speed boost, you just might catch it. That’s the trick — an Oberth solar maneuver — scientists have worked out for reaching 3I/ATLAS. Launch in 2035 and you could pull it off, though the journey takes 35–50 years. Makes you wonder: what else could we chase down like that in interstellar space?
Spinning a sling, we whirl a stone. Its speed builds, and if released at the lowest point, it flies farthest. In space, the gravity of the Sun acts as the strap: the probe dives as close to the star as possible, and at the moment of maximum speed, a brief engine thrust—like a yank of the hand—gives it a huge boost.
This maneuver would allow us to catch up to the departing interstellar object 3I/ATLAS. To work, the probe must pass within just 3.2 solar radii of the Sun's center—almost through its scorching corona. At that point, the heat is thousands of times more intense than at Earth; only a powerful heat shield will save the spacecraft from destruction. If we can launch by 2035, in 35–50 years we'll get the first images and samples of matter from another planetary system.
🎯 The closest approach to the Sun is 2.2 million km. That's six times farther than the Moon, but the heat there is thousands of times more intense than in Earth's orbit.
🎬 Arthur C. Clarke in 'The Wind from the Sun' sent yachts racing to the Sun for a prize, and now we're turning the star itself into a fiery sling for a chase.