Aliens

Front

What is a habitable zone?

Back

The orbital region around a star that can support liquid water.

Front

Is it true that once interstellar travel is solved, colonizing the Galaxy will take less time than the Galaxy's lifetime?

Back

True

Front

What phenomenon is characterized by glowing orbs often associated with thunderstorms?

Back

Ball lightning.

Front

What is the biggest obstacle to interstellar travel today?

Back

The speed of our spacecraft.

Front

What is the geometric mean?

Back

A mathematical trick for finding an order of magnitude middle value between an overestimate and an underestimate.

Front

What is the definition of interstellar travel?

Back

Travel between stars in the galaxy.

Front

What is the significance of liquid water in the search for extraterrestrial life?

Back

Liquid water is essential for life as we know it, making it a key factor in identifying habitable zones.

Front

What are the main challenges of interstellar travel?

Back

Speed, energy requirements, and long durations of travel.

Front

What is the difference between a star and a planet?

Back

A star is a massive celestial body that generates light and heat through nuclear fusion, while a planet is a smaller body that orbits a star.

Front

What is the Fermi Paradox?

Back

The apparent contradiction between the high probability of extraterrestrial life and the lack of evidence for, or contact with, such civilizations.