What If There Was Another Earth in Our Solar System?

Twin siblings, twin peaks, twin cities, twin planets... Two earths, one solar system. How would that work?

Where would it have to be located? Can two planets share an orbit?

Would people on another Earth be the same as us? Would we be in touch?

Transcript and sources:

Watch more what-if scenarios:
Planet Earth:
The Cosmos:
Technology:
Your Body:
Humanity:

Follow what-if on Instagram for bonus material:
Suggest an episode:
T-shirts and merch:
Facebook Watch:
Watch on Tubi:

"Imagination will often carry us to worlds that never were. But without it, we go nowhere." — Carl Sagan

If you enjoy What If, make sure to check out our other channel "Underknown":

Produced by Underknown in Toronto, What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure — grounded in scientific theory — through time, space and chance, as we ask what if some of the most fundamental aspects of our existence were different.

what if,what happens if,scifi,science documentary,what if scenario,scientific answers to hypothetical questions,possible worlds,crazy questions in science,biggest questions in science,second planet earth,another planet earth,Kepler-452,planet Kepler,can we inhabit kepler,building life on another planet,life on other planets,what is kepler,another earth in our solar system,new planet earth in our solar system,new planet like earth,solar system secrets,