🧵 5AM, pre-coffee conversations with #GPT. 🤖 But I’m more interested in hearing from the #astronomy experts cause I ain’t no #scientist. ☕
So, in the words of #Reba McEntire, “Is there life out there?” 🌍👽
#cosmology #space #universe
So, in the words of #Reba McEntire, “Is there life out there?” 🌍👽
#cosmology #space #universe
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👉 34 rocky planets + major moons
👉 8 are potentially habitable with atmospheres or oceans:
#Earth (for now)
#Mars
Europa
Enceladus
Titan
Ganymede
Callisto
Triton
That’s 24% of rocky bodies with potential #life in our solar system?
Let’s zoom out to the #MilkyWay #galaxy 🔭
If 8 habitable objects exist in each star system:
👉 48 billion potentially habitable worlds may be in our galaxy.
But what about the rest of the #universe? 🔭
👉 ~2 trillion galaxies exist 🌌
👉 200 billion stars per galaxy ✨
👉 400 sextillion total stars in the universe 🤩
👉 ~96 sextillion potentially habitable worlds 🤯
But how many galaxies have had enough time for life to emerge? ⌚
About half of observable galaxies are as old as ours was at that time.
👉 1 trillion mature galaxies with ~48 sextillion habitable worlds.
👉 48 quintillion life-bearing worlds.
If only 1 in a million developed complex ecosystems?
👉 48 quadrillion planets with diverse biospheres.
👉 400 sextillion stars in the universe ≈ water drops in Earth’s oceans 🌊
👉 48 sextillion potentially habitable worlds ≈ red blood cells of all humans on Earth 🩸
👉 48 quadrillion planets with ecosystems ≈ leafs on all Earth’s trees 🍃
#dilation