Summary
Astronomers using the ALMA observatory found high levels of methanol, a type of alcohol, in comet 3I/ATLAS, which came from outside our solar system. This discovery shows that the chemical makeup of 3I/ATLAS is different from most comets in our solar system, providing new insights into the formation of planetary systems elsewhere.
Key Facts
- The Atacama Large Millimeter/submillimeter Array (ALMA) detected unusually high methanol levels in comet 3I/ATLAS.
- Methanol is a simple alcohol found in comets.
- The comet's methanol levels are higher than those seen in most comets from our solar system.
- ALMA's observations happened in late 2025 as the comet neared the Sun.
- Methanol and hydrogen cyanide were the two key molecules studied in 3I/ATLAS.
- The comet showed a methanol-to-hydrogen cyanide ratio much higher than usual.
- This comet is the third confirmed visitor from outside our solar system, following 1I/‘Oumuamua and 2I/Borisov.
- The high methanol levels suggest 3I/ATLAS formed under different chemical conditions compared to solar system comets.
