Does the Solar system have a ninth planet after all?

Some of us remember August 24 2006 like it was yesterday. I was 11 years old, and my entire class began lunch break by passionately chanting “Pluto is a planet” in protest of the information we’d just received. If we can see galaxies billions of light years away, shouldn’t we be able to spot a ninth planet in our own Solar System? In 2021, a team using the Atacama Cosmology Telescope published the results from their search for a ninth planet’s movement in the outskirts of the Solar System. Finding exoplanets Even though we have telescopes that can reveal galaxies from the universe’s earliest years, we still can’t easily directly image planets outside of our Solar System, also called exoplanets.