The comet, also designated C/2025 F2, would have been visible just after dark slightly north of where the sun set. Its green color would have been difficult to see with the naked eye. This might ...

By stimulating certain cones with extreme precision, scientists can help humans perceive a new color that defies all ...

would have been visible just after dark slightly north of where the sun set. Its green color would have been difficult to see with the naked eye. This might have been the object’s first ever ...

diminishing hopes for naked-eye visibility. Discovered by amateur astronomers, this icy relic from the early solar system may not survive its first trip past the sun. A green comet likely is ...

The comet, also designated C/2025 F2, would have been visible just after dark slightly north of where the sun set. Its green color would have been difficult to see with the naked eye. This might ...