❓WHAT HAPPENED: Comet 3I/ATLAS, an interstellar object, is accelerating as it nears its closest approach to Earth.
👤WHO WAS INVOLVED: NASA and Harvard physicist Avi Loeb.
📍WHEN & WHERE: Closest approach to Earth expected on December 19, following its discovery in July by NASA’s ATLAS telescope in Chile.
💬KEY QUOTE: “If 3I/ATLAS is not enshrouded in a much more massive gas cloud after perihelion than it had in the months preceding perihelion, then its recent non-gravitational acceleration must have resulted from a different cause than cometary evaporation,” claims Loeb.
🎯IMPACT: The comet is being closely studied for its interstellar origins and behavior, but seemingly poses no danger to Earth.
The interstellar object 3I/ATLAS is accelerating due to non-gravitational forces as it approaches its closest point to Earth along its trajectory through our solar system. In recent weeks, scientists studying the object have taken note of “significant” accelerations and shifts in its trajectory, which they attribute to gas releases from the object caused by heat from the Sun.
While most of the scientific community believes 3I/ATLAS is a comet originating from deep space, Harvard physicist Avi Loeb has—in what some consider a publicity stunt—posited that the object could be an extraterrestrial mothership releasing small alien probes. Loeb previously argued that astronomers have yet to find sufficient evidence of gas emissions from the object, which would typically indicate a cometary nature.
“If 3I/ATLAS is not enshrouded in a much more massive gas cloud after perihelion than it had in the months preceding perihelion, then its recent non-gravitational acceleration must have resulted from a different cause than cometary evaporation,” he claimed. Last month, NASA discovered that the object had accelerated its speed from over 130,000 mph to around 152,000 mph after its closest approach to the sun on October 29.
However, NASA’s lead scientist for solar system small bodies, Tom Statler, has dismissed Loeb’s theory, stating, “It looks like a comet. It does comet things. It very, very strongly resembles, in just about every way, the comets that we know.” Loeb himself has also acknowledged that the likelihood of 3I/ATLAS being of technological origin is slim, but emphasized the importance of evidence-based science.
3I/ATLAS is expected to make its closest approach to Earth on December 19, coming no closer than 170 million miles.
Image: Olivier Hainaut et al./European Southern Observatory (processed by Nrco0e).
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