Alien civilisation and its possible impacts (existential)

Description

Impact of the range from the existence of other civilization up to direct attack from alien civilisation.

Finding Alien Civilisation
Level of the risks depends on the level of the civilization (Kardashev scale)

Type II (stars level)
Type III (galaxy level)

Possible contact with Alien Civilisation
Physical or logical interaction with other civilization.

Star wars
Possible Alien military attack.

Importance

High

Links

Space.com:
http://www.space.com/32793-intelligent-alien-life-probability-high.html

Kardashev scale of the civilizations:
https://en.wikipedia.org/wiki/Kardashev_scale

Military aspects of the Type II and Type III civilizations
http://www.lewik.org/d/pathway-to-the-solar-system-colonization-milky-way-and-beyond/?lang=en

Súvisiace pojmy:

Nadradený pojem:

Space risks

Susedné pojmy:

Near hypernova eruption (global)
Collision with asteroid or other NEO (existential)
Very strong Solar flare (global)
Ultra-high-energy cosmic rays (global)
Wandering black hole, star or other massive object (existential, millions years later)
Sun growing brighter as it ages (existential, billions years later)
Collision with other galaxy (existential, billions years later)
Accelerating expansion of the Universe (existential, billions years later)
Significant changes in universal constants (existential)
Extraterrestrial life and its possible impact (existential)
Existence of complex entities running the visible Universe (existential)
Cosmic ray effects