Why we can accurately detect stars billions of light years away, but we can’t confirm if we have a 9th planet in our solar system?
In: 2123
The light is an issue, as others have said, but also, what counts as a planet? They changed the definition to exclude Pluto a few years ago because as telescopes get more sophisticated, they were finding things bigger than Pluto orbiting the Sun. They had to choose between eight planets and an indeterminate number, probably dozens, maybe hundreds.
Latest Answers