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Watch comet PANSTARRS 'switch on' its second tail as it makes closest approach to Earth
The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its closest approach.
The behaviour of a celestial object has sparked a cosmic debate. Astronomers are accustomed to comets sporting a bright, distinctive tail as they zoom near the Sun. So, when the object 3I/ATLAS was ...
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