How many planets have been detected beyond our solar system?

Over 3,000 planets have been detected.

What is the estimated number of potentially Earth-like planets in the Milky Way galaxy?

There are about 20 billion potentially Earth-like planets.

Venus, Mars, and Earth are in the habitable zone.

Jupiter's moon Europa is a top candidate.

The absence of evidence of alien civilizations.

The discovery of over 3,000 planets beyond our solar system, with potentially 20 billion Earth-like planets in the Milky Way, challenges the notion of Earth's uniqueness and raises the possibility of alien life existing elsewhere in the universe.
The Fermi Paradox highlights the perplexing absence of evidence for alien civilizations despite the high probability of their existence, pointing towards potential barriers like self-destruction or the rise of machine intelligence that could inhibit the evolution of intelligent life.

How many planets have been detected beyond our solar system?
Over 3,000 planets have been detected.
What is the estimated number of potentially Earth-like planets in the Milky Way galaxy?
There are about 20 billion potentially Earth-like planets.
Which planets are included in the habitable zone of our solar system?
Venus, Mars, and Earth are in the habitable zone.
What is the top candidate for hosting multicellular life outside of Earth?
Jupiter's moon Europa is a top candidate.
What does the Fermi Paradox question?
The absence of evidence of alien civilizations.

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Earth was initially thought to be unique, but with the advancement of philosophy and science, we discovered it is one of eight planets orbiting the sun.
Over time, we realized the existence of other galaxies and that the stars in the sky are suns with planets orbiting them, potentially hosting alien life.
In the early 1990s, we began detecting planets beyond our solar system, with over 3,000 planets detected so far, thanks to missions like the Kepler telescope.
It is now believed that nearly every star in the sky has planets orbiting it, leading to an estimate of about 20 billion potentially Earth-like planets in the Milky Way galaxy.
The habitable zone in our solar system includes Venus, Mars, and Earth, all of which could have been habitable due to the presence of water on their surfaces.
Jupiter's moon Europa is a top candidate for hosting multicellular life, with NASA planning the Europa Clipper Mission to explore its potential ocean of liquid water.
The Fermi Paradox questions the absence of evidence of alien civilizations despite the vast number of planets and stars, suggesting potential barriers to the evolution of intelligent life, such as self-destruction or the transition to machine intelligence.