It’s official: Man altered the orbit of a celestial body around the Sun for the first time

The news comes from a study that delves into the effects of the deliberate impact against the asteroid Dimorphos, more than 3 years ago.

The summary is made by: it’s official – Man altered the orbit of a celestial body around the Sun for the first time.

It’s true: the DART mission, and NASA, managed for the first time to measurably alter the trajectory of a celestial body around the Sun.

The conclusion comes in a new report that delves into the effects of the deliberate impact against the asteroid Dimorphos, in September 2022.

The experience was already considered a milestone in planetary defense because it modified Dimorphos’ orbit around the larger asteroid, Didymos. Now, scientists confirm that the collision also changed slightly to orbit of the entire binary system around the Sun.

The test was designed to assess whether it would be possible to divert a potentially dangerous object to Earth in advance.

Dimorphos and Didymos never posed a threat, but were chosen because they formed an ideal system for accurately measuring the effects of a kinetic clash.

After the collision, NASA had already determined that Dimorphos’ orbit around Didymos was shortened by about 33 minutes — far above initial expectations, as .

The novelty is in the broader scale of the effect. According to new measurements from , the impact has reduced by 0.15 seconds the time it takes the system to complete one revolution around the Sun, also changing its orbital speed by just over 10 micrometers per second.

This is a tiny change, but enough to show that a small deviation applied many years in advance could, in theory, avoid a future collision with Earth.

The researchers also emphasize that the debris expelled by Dimorphos after the collision amplified the effect of the impact, providing an additional thrust comparable to that of the spacecraft itself.

ESA’s European Hera mission is expected to arrive at the system in November 2026 to study in detail the consequences of the crash and collect new data on the structure and mass of the two asteroids.