NASA intensified monitoring of the interstellar comet 3I/ATLAS, discovered in July 2025, after inclusion on the UN’s list of space threats. The object, which originates from an ancient star system, approaches Earth at more than 60 km/s and reaches its closest point in December. Authorities activated planetary defense protocols to assess collision risks.
Elon Musk, founder of SpaceX, compared the size of the comet to the island of Manhattan. He highlighted that an impact would depend on the total mass of the celestial body.
- Speed: greater than 60 km/s.
- Origin: stellar system about seven billion years old.
- Discovery: July 2025 by ATLAS observatory.
Composition of the celestial object
Spectroscopic studies reveal the presence of water, carbon monoxide and methane in 3I/ATLAS. These volatile compounds indicate sublimation processes when interacting with the solar wind.
The Hubble Telescope captured images of the comet 445 million kilometers from Earth on July 21. Analysis shows similarities with comets from the Solar System.
Signals detected
An observatory in South Africa has identified radio emissions coming from 3I/ATLAS. Measurements associate the phenomenon with the release of gases.
Experts ruled out an artificial origin for the signals. The event results from natural interactions with the space environment.
Dimensions and speed
The comet has an extension comparable to the island of Manhattan, according to Musk’s assessment. Its total mass defines the potential for destruction in the event of a collision.
The speed of approach requires continuous monitoring by space agencies. The unusual trajectory led to the classification as a threat.
Monitoring Strategies
NASA plans to use advanced probes and telescopes during the December flyby. The data collected will improve defense models against interstellar objects. Global observatories contribute real-time tracking to refine orbital projections.
Next steps
Space agencies coordinate efforts to collect detailed information on the approach. Focus includes internal structure and behavior of the comet.
- Probes: sending for upcoming analysis.
- Telescopes: Hubble and others in operation.
- Objective: improve protection strategies.
Detailed trajectory
3I/ATLAS has been traveling through space for billions of years since its home system. The current orbit crosses the inner Solar System. Forecasts indicate safe passage, but require constant checking.
