1

What would the Short Term effects be on the earth is another heavenly body, similar in size of our current moon were to suddenly appear in orbit? I would assume large tidal activity, perhaps even tectonic and severe meteorological effects.

What would the earth look like 50 to 100 years later, after this cataclysmic event?

L.Dutch
  • 286,075
  • 58
  • 587
  • 1,230
cactusknight
  • 19
  • 1
  • Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. – Community Feb 26 '22 at 20:13
  • 5
    You need to describe the additional moon's orbit before this question is answerable. Do not put it "in the same orbit as the current moon on the other side of Earth," because that position is not stable and the two moons will collide within a few years. The result of that is "rocks fall, everyone dies." – John Dallman Feb 26 '22 at 20:16
  • Particularly if this moon is of similar mass to and in any orbit nearby our current moon, you've got a particularly egregious case of the three body problem, so without precise orbital information, the answer can range from "both moons leave Earth" to "rocks fall, everyone dies". – jdunlop Feb 26 '22 at 20:40
  • Agree with John Dallman, you need to decide first, how wide the orbit is. Else you can't know the effects. Earth's moon orbit diameter is 768,000 km, don't go near that with another big one! our moon is already quite big. – Goodies Feb 26 '22 at 20:44
  • Is it too late to just change the gravitational constant of the universe? – elemtilas Feb 27 '22 at 03:17
  • @cactusknight tip, use a WB search,. there's a lot of similar rogue moon topics and questions, https://worldbuilding.stackexchange.com/search?q=moon+collide – Goodies Feb 27 '22 at 16:17

1 Answers1

0

A similar question has been asked here, here, here and here.

Tides

There could be more than two high tides per day. If the two moons are in same direction, tides will be very high causing tsunamis.

Earthquakes

Volcanic activity will increase with more earthquakes.

imtaar
  • 5,661
  • 4
  • 22