Could the interstellar object be an alien spaceship? The silence by NASA, ESA and China on 3I/Atlas ever since it flew by Mars has raised concerns about the nature of the object. Besides, its shape ...

Interstellar Comet 3I/ATLAS is fast racing towards the inner solar system. It now has a cometary tail and a bright coma.

The idea that extraterrestrial intelligence could be observing Earth sounds like science fiction, and there is currently no verified evidence that it is happening. But scientists do take a related ...

3I/ATLAS entered our solar system from another star on a one-way path around the Sun. When James Webb studied its light, the discovery suggested this strange visitor may be older than the Sun itself.

More than tenfold: That is the reported deuterium difference between water in interstellar comet 3I/ATLAS and water measured ...

Interstellar comet contains an unusually high amount of methanol, and new data indicate that it was born in a very cold and ...

I/ATLAS interstellar comet, first photographed from Mars orbit in October 2025, carries water ice with deuterium levels more ...

彗星を紫外線・可視光線・近赤外線の波長で観測すると、彗星核の氷に含まれていた様々な分子（と、それが太陽紫外線で壊れてできる原子・分子）による輝線が無数に観測されます。これらの分子輝線をしっかりと分離して個別に分析するには、「高い波長分解能」（より細か ...

This flyby was also a chance to test the craft's scientific instruments, though this isn't the first time Juice's science ...

The Juice maneuver allowed the probe to change its course by 20° and increase its speed by 3.5 km/s, while conserving most of its fuel.

True to his promise made a few days ago, astrophotographer Andrew McCarthy has released a deep-field image of a spiral galaxy that is under the spotlight for its brand-new supernova. On X, McCarthy ...