Anonymous
6/10/2025, 10:15:35 PM
No.16694517
>>16694507
Assuning you know where to look with astrononical precision, and you are within 100 light years, you could probably pick up our radio with a powerful enough receiver (not realistic, but possible in principle). If you saw Earth transiting in front of our sun, you could do spectroscopy on the atmosphere and see the disequilibrium in oxygen and other gases (not definitive but a strong oddity) and if you could resolve it in infrared you would see the red edge caused by plant life.
If you are within this solar system, you would have to basically be blind not to see us if you have our level of technology.
Assuning you know where to look with astrononical precision, and you are within 100 light years, you could probably pick up our radio with a powerful enough receiver (not realistic, but possible in principle). If you saw Earth transiting in front of our sun, you could do spectroscopy on the atmosphere and see the disequilibrium in oxygen and other gases (not definitive but a strong oddity) and if you could resolve it in infrared you would see the red edge caused by plant life.
If you are within this solar system, you would have to basically be blind not to see us if you have our level of technology.