Question

What is planet Vulcan and theia.​

Answer 1

Theia is a hypothesized ancient planet in the early Solar System.

Vulcan is a small hypothetical planet that was proposed to exist in an orbit between Mercury and the Sun.

Answer 2

https://www.smithsonianmag.com/smart-news/what-would-planet-smashed-moon-have-been-180951681/

https://www.youtube.com/

https://goo.gl/search/Theia

Theia, Planet

Explanation:

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